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A vessel sighting a northern right whale dead ahead should __________. alter course to give a wide clearance maintain course and speed report the whale's position to the Canadian Coast Guard All of the above.
Northern right whales can be identified by __________. whitish patches of skin on top of the head no dorsal fin on the back "V" shaped blow easily visible from ahead or behind All of the above.
A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? Illustration D015NG A
B C D
NGA (NIMA) charts are adopting the metric system. In order to change a charted depth in meters to feet you may use the conversion table found __________. in the Light List on the chart in Bowditch All of the above.
A HYDROLANT warning would normally be sent for all of the following EXCEPT __________. the presence of a large unwieldy tow in congested offshore water a report of an overdue ship

extinguishment of Robbins Reef Light in New York City's Upper Bay unexploded ordinance in ocean waters at a depth of 78 fathoms (143 meters)
A NAVAREA warning carries the following number; 1986/87 (11). Which statement is TRUE This warning is valid in 1986 and 1987 and is the eleventh two-year warning.
This is warning number 1986 issued in 1987, and it affects sub-region 11. The warning was issued in 1986, the 87th sequentially numbered warning and broadcast 11 times.
 o
The subject of this warning first appeared in 1986; this warning is in 1987 and is the eleventh on this topic.
A major advantage of the NAVTEX system when compared to other systems is that __________. a low frequency band is used for long distance transmission the information can be received on an ordinary FM radio broadcasts are at scheduled times warnings are printed out for reading when convenient
On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned to Naval Control of Shipping. Further information is contained in __________. Radio Aids to Navigation (PUB 117) the Light List the Coast Pilot the International Code of Signals (PUB 102)
On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned to Naval Control of Shipping. Further information is contained in __________. Radio Aids to Navigation (PUB 117) the International Code of Signals (PUB 102) the Light List the Coast Pilot
On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned to Naval Control of Shipping. Further information is contained in __________. the Coast Pilot Radio Navigational Aids (PUB 117) the International Code of Signals (PUB 102) the Light List
All of the following can be found on a Pilot Chart EXCEPT information concerning the __________. percentage of frequency of wave heights percentage of poor visibility conditions amounts of precipitation sea surface temperatures
You are proceeding under NCS (Naval Control of Shipping) and wish to send a message warning of a hurricane. Which precedence would you assign this message? (IMMEDIATE) P (PRIORITY) Z (FLASH) R (ROUTINE)
You are proceeding under NCS (Naval Control of Shipping) when it becomes necessary to send a distress message. Which precedence would you assign this message? R (ROUTINE) (IMMEDIATE) P (PRIORITY) Z (FLASH)
You are proceeding under NCS (Naval Control of Shipping) and wish to send a message concerning an initial enemy contact. Which precedence would you assign this message? P (PRIORITY) R (ROUTINE) Z (FLASH) (IMMEDIATE)
You are proceeding under NCS (Naval Control of Shipping) when you wish to send a message concerning your ships diversion. Which precedence would you assign this message?
Z (FLASH)
R (ROUTINE)
(IMMEDIATE)

P (PRIORITY)
You are proceeding under NCS (Naval Control of Shipping) and wish to send a message by rapid transmission which does not require a higher precedence. Which precedence would you assign this message? R (ROUTINE) P (PRIORITY) (IMMEDIATE) Z (FLASH)
You are proceeding under NCS (Naval Control of Shipping) and wish to send a message concerning an initial enemy contact. Which precedence will you assign this message? P (PRIORITY) R (ROUTINE)

Z (FLASH (IMMEDIATE)
You are proceeding under NCS (Naval Control of Shipping) when you wish to send a message concerning your ships diversion. Which precedence would you assign this message? R (ROUTINE) (IMMEDIATE) Z (FLASH)

P (PRIORITY)
You are planning a voyage from New York to Norway via the English Channel. Which publication contains information on the dangers to navigation in the English Channel? World Port Index Sailing Directions (Enroute) Coast Pilot Channel Pilot's Guide
You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes? Coast Pilot World Port Index Sailing Directions (Planning Guide) Sailing Directions (Enroute)
On an isomagnetic chart, the line of zero variation is the __________. zero variation line variation line isogonic line agonic line
Magnetic information on a chart may be __________.
indicated by isogonic lines
found in a note on the chart
found in the center(s) of the compass rose(s)

All of the above.
Lines on a chart which connect points of equal magnetic variation are called __________. isogonic lines magnetic declinations dip magnetic latitudes
The agonic line on an isomagnetic chart indicates the __________. magnetic longitude reference line points where there is no annual change in variation magnetic equator points where there is no variation
Isogonic lines are lines on a chart indicating __________. points of equal variation points of zero variation magnetic dip the magnetic latitude
How is variation indicated on a small-scale nautical chart? Magnetic meridians Variation is not indicated on small-scale nautical charts. Magnetic compass table Isogonic lines
The annual change in variation for an area can be found in __________. Variation does not change.
the center of the compass rose on a chart of the area the handbook for Magnetic Compass Adjustment, Pub 226 the compass deviation table
Which information does the outer ring of a compass rose on a nautical chart provide?
Variation
Magnetic directions
Annual rate of variation change

True directions
On a nautical chart, the inner ring of a compass rose indicates __________. true directions magnetic directions
 
compass error deviation
Charts showing the coast of Mexico are produced by the United States __________. Naval Observatory Coast Guard National Ocean Service National Geospatial-Intelligence Agency
The navigation regulations applicable to a U.S. inland waterway can be found in the __________. Notices to Mariners Channel Reports Coast Pilots Sailing Directions
On the Mississippi River, gage zero is the gage reading measured from the __________. the lowest recorded river depth the highest recorded river depth National Geodetic Vertical Datum low water reference plane
Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from __________. low steel on the Huey P. Long Bridge the local water table mean sea level the minimum dam control level
At McAlpine L & D, normal upper pool elevation is 420.0 feet MSL, equal to 12.0 feet on the upper gage. The vertical clearance at the Clark Memorial Highway bridge is 72.6 feet above normal pool. What is the clearance if the gage reads 27.2 feet? 57.4 feet 72.6 feet 25.4 feet 60.6 feet
At McAlpine L & D, normal upper pool elevation is 420.0 feet (130.8 meters) MSL, equal to 12.0 feet (3.7 meters) on the upper gage. The vertical clearance at the Clark Memorial Highway bridge is 72.6 feet (22.1 meters) above normal pool. What is the clearance if the gage reads 10.6 feet (3.2 meters)? 84.6 feet (25.8 meters) 83.2 feet (25.4 meters) 62.0 feet (18.9 meters) 74.0 feet (22.6 meters)
Who should be consulted for changing conditions of controlling depths in major channels? U.S. Coast Guard U.S. Army Corps of Engineers National Geospatial-Intelligence Agency National Ocean Service
Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.
Light List Vol. V
Sailing Directions
U.S. Coast Pilot

Broadcast Notice to Mariners
Navigation charts of the Upper Mississippi River are published by __________. National Ocean Service U.S. Coast Guard Corps of Engineers, U.S. Army Lake Survey
Who publishes the navigation charts of the Upper Mississippi River? Lake Survey U.S. Coast Guard Corps of Engineers, U.S. Army National Ocean Service
How is a navigation light identified on an Army Corps of Engineers navigation map? Name and light characteristic Name and miles from a reference point Light characteristic and miles A.H.P. None of the above
The National Geospatial-Intelligence Agency (formerly the National Imagery and Mapping Agency) would produce a chart of the coast of __________. Canada Puerto Rico Hawaii Alaska
On the Corps of Engineer's Navigation Maps, the channel is __________. indicated by a broken line not indicated indicated by depths (in feet) midway between the banks
On an Army Corps of Engineers navigation map, each mile A.H.P. on the Lower Mississippi River is marked by a __________. number showing mileage black dot dashed red line navigation light
What is NOT found in the Mississippi River System Light List? Distance between major points on the Mississippi River Distance that a lighted aid to navigation can be seen at night Times of Coast Guard broadcasts concerning river stages A color plate showing the details of the aids to navigation used on the Mississippi River
The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port side of a vessel __________. ascending the river proceeding from seaward descending the river crossing the river
The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboard side of a vessel __________. descending the river crossing the river proceeding towards sea ascending the river
The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port side of a vessel __________.
descending the river
proceeding towards sea
ascending the river
crossing the river
The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starboard side of a vessel __________. descending the river crossing the river ascending the river proceeding from seaward
All aids to navigation listed in the Mississippi River System Light List are shown as miles from a reference point and on the __________. port or starboard side of the vessel left or right ascending bank east or west bank left or right descending bank
What volume of the Coast Guard Light List is used for the Mississippi River system?
o
II
V
I
IV
In which source could you find the vertical clearance of a bridge on the Ohio River? Notice to Mariners Coast Pilot of the Gulf of Mexico Great Lakes Pilot Light List of the Mississippi River System
The revision date of a chart is printed on which area of the chart? Top center Lower-left corner Part of the chart title Any clear area around the neat line
A revised print of a chart is made __________. every two years to update the magnetic variation information when a low-stock situation occurs and minor corrections are made after every major hydrographic survey of the area covered by the chart when there are numerous corrections to be made or the corrections are extensive
A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue is a __________. new edition first edition reprint revised edition
What information is found in the chart title? Information on which IALA buoyage system applies Date of the edition and, if applicable, the revision Information on the sounding datum Date of the first edition
Which information is found in the chart title? Edition date Variation information Number of the chart Survey information
The survey information upon which a chart is based is found __________. at any convenient location at the top center of the next line at the lower left corner near the chart title
What information is NOT found in the chart title?
Projection Survey information Date of first edition Scale
The value of sixty nautical miles per degree of geodetic latitude is most correct at __________. the poles latitude 45° all latitudes the equator
What is the length of a nautical mile? 2,000 yards 1,800 meters 5,280 feet 6,076 feet
In which source could you find the number of a chart for a certain geographic area? Catalog of Charts U.S. Coast Guard Light List Chart No. 1 American Practical Navigator
The compass rose on a nautical chart indicates both variation and __________.
deviation compass error precession annual rate of variation change
The datum used for soundings on charts of the East Coast of the United States is __________. half tide level mean lower low water mean low water springs mean low water
When utilizing a Pacific Coast chart, the reference plane of soundings is __________. mean low water springs mean low water lowest normal low water mean lower low water
Mean lower low water is the reference plane used for __________. all vertical measurements heights above water for lights, mountains, etc. water depths on the U.S. east coast only soundings on the U.S. east and west coasts
The reference datum used in determining the heights of land features on most charts is __________. half-tide level mean sea level mean high water mean low water
Mean high water is the reference datum used to measure __________. both heights and soundings worldwide heights of topographical features in the United States soundings on the east coast of the United States soundings in European waters
Charted depth is the __________. average height of water over a specified period of time average height of all low waters at a place vertical distance from the chart sounding datum to the ocean bottom vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide
The datum from which the predicted heights of tides are reckoned in the tide tables is __________. given in table three of the tide tables the highest possible level mean low water the same as that used for the charts of the locality
The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________. high water tide level low water lower low water
The shoreline on charts generally represents the mean __________. low water line tide level low water spring line high water line
Mean high water is used __________.
to indicate the shoreline where there is a large tidal fluctuation
coast of the U.S.
as the sounding datum for rivers, lakes, etc. regulated by locks
as the reference plane for bottom contour lines
as the reference for soundings on the Gulf 
Mean high water is the reference plane used for __________. all vertical measurements water depths on the East Coast only soundings on the East and West Coasts heights above water of land features such as lights
The description "Racon" beside an illustration on a chart would mean a __________. radar calibration beacon radar conspicuous beacon

radar transponder beaco circular radio beacon
Which statement concerning the chartlet seen in illustration D010NG below is TRUE? (Soundings and heights are in meters) There is a 12-meter deep hole west of Beito Island and inside the 5-meter line. There is a dangerous eddy southeast of Beito Island. Maury lightship is visible for 17 miles. The bottom to the south-southeast of the lightship is soft coral.
What does the symbol shown in illustration D033NG below indicate on a chart? A can buoy with a rotating white light A safe water beacon A sunken vessel marked by a buoy A red and white can buoy
Which of the buoy symbols shown in illustration D032NG below indicates a safe water mark? Illustration D032NG C
D B A
Which statement concerning the chartlet in illustration D010NG below is true? (Soundings and heights are in meters)
Maury Lightship swings about her anchor on a circle with a 21-meter diameter.

There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island.

The position of the lightship is indicated by the center of the star on the symbol's mast.

The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum.
Chart legends printed in capital letters show that the associated landmark is __________. a government facility or station conspicuous inconspicuous a radio transmitter
Chart legends which indicate a conspicuous landmark are printed in __________. boldfaced print underlined letters

capital letter italics
On charts of U.S. waters, a magenta marking is NOT used for marking a __________. 5-fathom curve prohibited area radio beacon lighted buoy
Which aid is NOT marked on a chart with a magenta circle? Radar station Aero light Radar transponder beacon Radio beacon
Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a __________. green square with the letter G red triangle with the letter R white square with the letters GR white triangle with the letters RG
The buoy symbol printed on your chart is leaning to the northeast. This indicates __________. you should stay to the north or east of the buoy you should stay to the west or south of the buoy nothing special for navigational purposes the buoy is a major lighted buoy
The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light? Its distinguishing number is "19M". It is visible 10 miles. It has a radar reflector. None of the above
The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess? Its distinguishing number is "19M". It flashes once every ten seconds. It is visible two nautical miles. It has a red light.
The depth of water on a chart is indicated as 23 meters. This is equal to __________. 11.5 fathoms 12.6 fathoms 69.0 feet 78.6 feet
Sometimes foreign charts are reproduced by NGA. On such a chart a wire dragged (swept) area may be shown in purple or __________. green
yellow magenta red
The depth of the water is indicated on a chart as 32 meters. This is equal to __________. 11.50 fathoms 12.62 fathoms 17.50 fathoms 104.99 fathoms
Which symbol represents a 20-fathom curve? - - - - - - - - - . - - . - - . - - . -..-..-..-..- - - - - - - -
Which symbol represents a 10-fathom curve? ... ____ ... ____ ____ . _____ . ____ . ____ ........ ____ ____ ____
Which symbol represents a 2-fathom curve? .. .. .. .. .. ____ . ____ . ____ . .. ____ .. ____ .. ____ -- -- -
Sometimes foreign charts are reproduced by NGA. On such a chart, a wire-dragged, swept area may be shown in green or __________. purple
black yellow red
The visible range marked on charts for lights is the __________. minimum distance at which the light may be seen with infinite visibility
maximum distance at which a light may be seen in clear weather with 10 miles visibility
 o
minimum distance at which the light may be seen based on a 12 mile distance to visible horizon
 o
maximum distance the light may be seen restricted by the height of the light and the curvature of the earth
On U.S. charts, you can tell if a named feature such as a rock (i.e. Great Eastern Rock in Block Island Sound) is submerged by the __________. style of type used to print the name magenta circle around the feature dashed circle around the feature color of ink used to print the name
Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the __________. rock is dry at high water rock is a hazard to deep draft vessels only exact position of the rock is doubtful rock is visible at low water springs only
When slanted letters are used to spell the name of a charted object you know the __________. object may cover and uncover with the tide object is only a hazard to vessels drawing in excess of 20 feet object is always visible position is approximate or doubtful
If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms? Sailing Charts of the Caribbean Sea Light Lists, Atlantic and Gulf Coast Pilot Charts of the North Atlantic Tidal Current Tables
Which would you consult for information about the general current circulation in the North Atlantic Ocean? Coast Pilot Climatological Atlas Pilot chart Current Table
A pilot chart does NOT contain information about __________. tidal currents
 
magnetic variation average wind conditions average limits of field ice
The numeral in the center of a wind rose circle on a pilot chart indicates the __________. percentage of calms total number of observations average wind force in knots average wind force on the Beaufort scale
Solid green arrows on the main body of a pilot chart indicate __________. shortest great circle routes prevailing wind directions prevailing ocean current directions probable surface current flow
How is the annual rate of change for magnetic variation shown on a pilot chart? Red lines on the main body of the chart Annual rate of change is not shown. Gray lines on the uppermost inset chart In parenthesis on the lines of equal magnetic variation
If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________. Coast Pilot Pilot Chart Notice to Mariners None of the above
What publication contains descriptions of the coast line, buoyage systems, weather conditions, port facilities, and navigation instructions for the United States and its possessions? Sailing Directions Light List Coast Pilots Port Index
Which government agency publishes the U.S. Coast Pilot? U.S. Coast Guard National Ocean Service Army Corps of Engineers National Geospatial-Intelligence Agency
You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers, obstructions, anchorages, and marine facilities available in that port? American Practical Navigator
Sailing Directions Coast Pilot Notice to Mariners
What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots?
National Ocean Service
National Imagery and Mapping Agency
U.S. Naval Observatory
U.S. Coast Guard
Where would you expect to find climatological and meteorological tables for the Gulf Coast area? Only at the National Weather Service office In the publication entitled Radio Aids to Navigation In the back of Coast Pilot #5 In any Coast Pilot volume
Which table is NOT found in the U.S. Coast Pilots? Luminous range table Coastwise distance table Meteorological table Climatological table
Which publication should you check for complete information on Puget Sound weather conditions? Chart of the area Coast Pilot Light List Sailing Directions
The National Ocean Service publishes the __________. Light Lists Coast Pilots Sailing Directions pilot charts
Which publication contains information on navigation regulations, landmarks, channels, anchorages, tides, currents, and clearances of bridges for Chesapeake Bay? Pilot Charts Sailing Directions Coast Pilot Light List
Information about the pilotage available at Miami harbor may best be obtained from which publication? United States Coast Pilot World Port Index Pilot Chart Sailing Directions
Which publication would describe the explosive anchorages in the ports on the east coast of the United States? Pilot Rules for Inland Waters Coast Pilot Sailing Directions Notice to Mariners
What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and anchorages of Long Island Sound? Pilot Chart Light List Coast Pilot Sailing Directions
You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in __________. Bowditch Corps of Engineers Information Bulletin the publication "Key to the Locks" Coast Pilot
You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in __________.
Bowditch

the publication "Key to the Locks"

Corps of Engineer Information Bulletin

Coast Pilot
It is unlawful to approach within how many yards of a northern right whale? 200 300
400 500
Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's only known calving grounds which lie off the coasts of __________. Georgia and NE Florida California and Mexico Nova Scotia Maine and Massachusetts
If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to __________. stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away

turn away from the whale and leave at full speed

turn away from the whale and leave at slow speed

slow to bare steerageway until the whale swims away
The population of northern right whales, an endangered species, numbers approximately __________. 300 5000 100000 1000000
Information on northern right whales can be found in __________. HO 229 the Nautical Almanac Ship's Medicine Chest and Medical Aid at Sea the Coast Pilot
What is published by the U.S. Coast Guard?
Light List
Tide Tables
Nautical Charts
U.S. Coast Pilot
The U.S. Coast Guard publishes __________. Light Lists Radio Navigational Aids U.S. Coast Pilots All of the above.
Which agency publishes the Light Lists?
National Ocean Service
Army Corps of Engineers
Oceanographic Office

United States Coast Guard
Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners? True bearings as observed from the light toward the ship Geographical positions outlining the area of the sector An outline of the area of the sector True bearings as observed from the ship toward the light
When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found? Light List On the chart Coast Pilot Notice to Mariners
The Light List Does NOT contain information on __________. the Global Positioning System (GPS) radio beacon systems radio direction finder calibration stations aeronautical lights useful for marine navigation
How is the intensity of a light expressed in the Light Lists? Nominal range Meteorological range Geographic range Luminous range
To find the specific phase characteristic of a lighthouse on a sound of the United States you would use the __________. U.S. Coast Pilot Light List American Practical Navigator Nautical Chart Catalog
Light Lists for coastal waters are __________. published every second year and must be corrected published every five years and require no correction accurate thru NM number on title page and must be corrected published every year and require no corrections
What is TRUE concerning new editions of Light Lists? Supplements to new editions are issued monthly by the U.S. Coast Guard. New editions are corrected through the date shown on the title page. New editions are published by the National Ocean Service. None of the above
Which publication lists Class I and II private aids to navigation in or along navigable waters of the United States? Aids to Navigation Manual List of Private Aids Sailing Directions Light List
Which describes privately maintained aids to navigation included in the Light List?
must be conspicuously marked by a signboard with the words "PRIVATE AID"
are painted white and must use a white light if lighted
are not permitted in or along first-class waterways and may be authorized for second- and third-class waterways

must conform to the standards of the U.S. Aids to Navigation System
Which agency maintains federal aids to navigation? Coast Guard National Ocean Service Corps of Engineers Maritime Administration
Civil twilight occurs at 0558 zone time on 30 December. Your DR position at that time is LAT 15°02'N, LONG 46°02'W. Which statement concerning the planets available for morning sights is TRUE? Saturn will be near the prime vertical. Venus, Jupiter, and Mars sights will yield a good three line fix. At 0558, Mars can be used for an ex-meridian observation. Venus will be visible low in the western sky.
When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________. GHA Polaris GHA Aries LHA Aries LHA Polaris
Civil twilight begins at 1910 zone time on 20 July. Your DR position at that time is LAT 22°16'N, LONG 150°06'W. Which statement concerning the planets available for evening sights is TRUE? Sights of Saturn, Jupiter, and Venus will yield a good three-line-of-position fix. Venus will have a westerly meridian angle. Mars, Venus, Jupiter, and Saturn will be above the horizon. Mars will set about one hour after the Sun sets.
In the Nautical Almanac provided, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars? 10-Jan 27-Mar 8-Oct 22-Jun
Civil twilight starts at 1812 zone time on 26 August, Your DR position at that time is LAT 21°06'S, LONG 14°56'W. Which statement concerning the planets available for evening sights is TRUE? Sights of Venus, Jupiter, and Saturn will yield a good three line fix. Mars will be near the prime vertical in the eastern sky. Venus may be identified from Saturn and Jupiter because it is the brightest. A sight of either Jupiter, Saturn, or Venus will give a latitude line.
The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________. centers of the various celestial bodies lower limb of a celestial body upper limb of a celestial body lower limb of the Sun and Moon; center of the stars and planets
The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and atmospheric pressure of __________. 29.72 inches (1006 millibars) 29.83 inches (1010 millibars) 29.89 inches (1012 millibars) 29.93 inches (1014 millibars)
What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights? Only first magnitude stars are tabulated. More accuracy is needed for celestial observations on board ship than what is tabulated. Sights must be made at even time increments to benefit from the tables. Only certain stars are included and sights must be limited to those stars.
The principal advantage of NAVTEX radio warnings is that __________. only an ordinary FM radio is necessary to receive these warnings they cover a broad spectrum of the radio band allowing reception on almost any type of receiver information on a given topic is only broadcast at specified times

they can be used by mariners who do not know Morse code
Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take? Send an AMVER report and acknowledge receipt of the warning. Remain a minimum of 500 miles outside the Persian Gulf and maintain radio silence. Send a MERWARN message advising your position, course, speed and intentions. Continue on course as the warning is advisory in nature only.
What is a "Special Warning"? An urgent message concerning a vessel in distress A radio navigational warning concerning a particularly hazardous condition affecting navigation

A broadcast disseminating an official government proclamation affecting shipping A weather advisory about unusual meteorological or oceanographic phenomena hazardous to vessels
Which would be the subject of a NAVAREA warning?
Off-air times of radio beacons when scheduled for routine maintenance Extinguishment of Wolf Trap Light located inside Chesapeake Bay A drifting buoy sighted in mid-ocean All military exercises on the high seas involving four or more vessels
The Coast Guard broadcasts urgent marine storm warning messages on which of the following frequencies?
157.10 MHz (VHF-FM Ch. 22A) 156.80 MHz (VHF-FM Ch. 16) 2670 KHz None of the above
Which statement about radio navigational warnings is TRUE? NAVAREA warnings concern only coastal navigation and inland navigation in large bays or sounds such as Puget Sound. The United States is responsible for NAVAREA warnings in the North Atlantic north of 7°N, and west of 15°W.

The topics for warnings included in HYDROLANTS, HYDROPACS, and NAVAREA warnings are the same Long range radio navigational warnings are usually broadcast by radiotelephone, radiotelegraph, and radio-teletypewriter.
What U.S. agency is responsible for NAVAREA warnings? National Ocean Service Coast Guard National Oceanic and Atmospheric Administration

National Geospatial-Intelligence Agency
The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts? I and II
IV and XII V and X VI and VII
In the United States, short-range radio navigational warnings are broadcast by the __________. Corps of Engineers Coast Guard NOAA harbor master of the nearest port
In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coastal waters of the United States? National Geospatial-Intelligence Agency American Meteorological Service U.S. Coast Guard U.S. Hydrological Survey
The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called __________. SAFESEA HYDROLANT/HYDROPAC NAVAREA NAVTEX
Which information is NOT provided in broadcasts by the National Institute of Standards and Technology? Time Announcements NAVAREA Warnings Storm Warnings GPS Information
Complete information on weather broadcasts throughout the world is contained in __________. Selected Worldwide Marine Weather Broadcasts your local newspaper the daily weather map the Notice to Mariners
Chart correction information is NOT disseminated through the __________. Local Notice to Mariners Chart Correction Card Daily Memorandum Summary of Corrections
The Daily Memorandum contains information on __________. the latest navigational warnings scheduled vessel arrivals and departures for a 24-hour period water levels at river ports where run-off affects tidal heights active weather disturbances such as hurricanes or tropical storms
Which publication indicates the HYDROLANTS or HYDROPACS issued since the previous working day? Broadcast Notice to Mariners Summary of Corrections Local Notice to Mariners Daily Memorandum
The Local Notice to Mariners is usually published __________. semiannually monthly daily weekly
Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of __________. Weekly Notices to Mariners marine broadcast Notice to Mariners corrected editions of charts Light Lists
Information about temporary, short term changes affecting the safety of navigation in U.S. waters is distributed to navigational interests by the __________. Summary of Corrections HYDROLANT or HYDROPAC broadcasts Local Notice to Mariners Daily Memorandum
Which is a weekly publication advising mariners of important matters affecting navigational safety? Coast Pilot Sailing Directions Light List Notice to Mariners
You are informed of defects or changes in aids to navigation by __________. Weekly Notice to Mariners marine broadcasts Local Notice to Mariners All of the above.
Charts should be corrected by using information published in the __________. Notice to Mariners American Practical Navigator Coast Pilot Light List
What is the most important source of information to be used in correcting charts and keeping them up to date? Sailing Directions Pilot Charts Notice to Mariners Fleet Guides
Coast Pilots and navigational charts are kept corrected and up-to-date by using the __________.
Notices to Mariners
Current Tables
Tide Tables
pilot charts
Information for updating nautical charts is primarily found in the __________. Notice to Mariners nautical chart catalogs Sailing Directions Coast Pilots
Which publication contains information on Naval Control of Shipping (NCS) in time of emergency or war? Light List Pub. 117, Radio Navigational Aids Pub. 102, International Code of Signals Appropriate volume of the Sailing Directions
Your vessel's operators send a message that your vessel has been consigned to Voluntary Naval Control of Shipping. The message will refer you to __________. the Light List the International Code of Signals (PUB 102) Radio Aids to Navigation (PUB 117) the Coast Pilot
Which Naval Control of Shipping publication should be aboard your vessel? ATP-2 Vol. II - Allied Control of Shipping Manual ATP-1 - Allied Tactical Signals NWP-II - Underway Replenishment Guide Warship Recognition Cards
Which Naval Control of Shipping publication should be aboard your vessel? ATP-1, Volume II "Allied Tactical Signals" NWP-14, "Amphibious Operations" PUB 102, "International Code of Signals" ATP-2, Volume II "Allied Control of Shipping Manual - Guide to Masters"
Naval Control of Shipping (NCS) publications should be __________. in the Master's custody safely stowed turned over to the relieving Master All of the above.
After inventorying the Naval Control of Shipping publications you find there is no copy of ATP-2, Volume II "Allied Control of Shipping Manual - Bridge Supplement". You should ask for a replacement from the __________. Chief of Naval Operations local Operational Control Authority Coast Guard Maritime Administration
Naval authorities would NOT give orders about which of the following, when the vessel is under control of the Naval Control of Shipping Organization?
Visual communication at sea
Diversions
Rescue operations

Schedules for loading cargo
When a merchant vessel is under the Naval Control of Shipping Organization in wartime, naval authorities may give orders pertaining to __________. regulations about darkening ship the stowage of explosives the types of cargoes permitted on board minimum manning standards
Which statement about Naval Control of Shipping in wartime is TRUE? It is mandatory for vessels bound foreign and voluntary for vessels in the coastwise trade. It is mandatory only for vessels sailing in convoy. It is mandatory in wartime. It is mandatory in hazardous areas and voluntary in other areas.
Which publication is NOT carried on board U.S. merchant vessels operating under Naval Control of Shipping? Communications Supplement Allied Control of Shipping Manual - Guide to Masters Tactical Control and Routing of Merchant Vessels All of the above.
Your vessel's operators send a message that your vessel has been consigned to Naval Control of Shipping. The message will refer you to __________. Radio Aids to Navigation (PUB 117) the Light List the Coast Pilot the International Code of Signals (PUB 102)
In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated ROUTINE will be delivered within __________. 3 hours 30 minutes 10 minutes or less 6 hours
In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated PRIORITY will be delivered within __________. 6 hours 10 minutes 3 hours 30 minutes
In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated IMMEDIATE will be delivered within __________.
30 minutes to 1 hour 1 to 6 hours 3 hours to start of business the following day 10 minutes if possible
In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated PRIORITY will be delivered within __________. 6 hours 30 minutes 10 minutes 3 hours
In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated FLASH will be delivered within __________. 1 to 6 hours 30 minutes to 1 hour 3 hours to start of business the following day less than 10 minutes
In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated IMMEDIATE will be delivered within __________.
30 minutes 3 hours 6 hours 10 minutes
In a national emergency, when communicating via the Navy, messages are sent by precedence. A message designated FLASH will be delivered within __________. 30 minutes 6 hours 3 hours

10 minutes
Allied Naval Control of Shipping (NCS) has been established. Which statement is TRUE? The Naval Control of Shipping Organization of each nation will serve their own ships only. The conduct of US-flag ships in an allied port will be controlled by US NCS authorities. Allied ships, which are at sea when an emergency is declared, will all be controlled by a central authority.

After Naval Control of Shipping has been established, permission to sail must come from local naval authorities or consular officers.
Under Naval Control of Shipping who is responsible for routing and diverting ships and convoys? The National Shipping Authority The Maritime Defense Zone Sector The Operational Control Authority Any Navy Command
Your ship is in a neutral port when full Naval Control of Shipping is established. You may expect to be boarded and instructed by a(n) __________. allied Naval Control of Shipping Officer Consular Shipping Advisors (CONSA) U.S. Naval Control of Shipping Officer Any of the above.
In time of war Naval Control of Shipping Authorities may give orders concerning the __________. cargo to be loaded final destination ship's route All of the above.
At the outbreak of war your ship is caught in an enemy port. Which statement is FALSE? You should attempt to contact U.S. Consular officials. You should attempt to clear for sea before your ship is interned. You should resist boarding by local officials. You should try to send a Ship Hostile Action Report to the NGA (formerly NIMA).
Defense plans may cause the operation of electronic aids to navigation to be suspended with __________. no notice a week's notice thirty (30) days notice one day's notice
Under defense plans, operation of electronic aids may be temporarily suspended with __________. thirty (30) day's notice a week's notice one day's notice no notice
At the establishment of Naval Control of Shipping (NCS), ships at sea will __________. stop and await further orders attempt to make their way to the nearest port of a friendly nation and await further instructions continue voyages unless in danger areas defined in the advisory or supplemental message keep radio silence
Which form of navigation may be suspended without notice under defense planning? electronic piloting celestial None of the above
You will be advised of any hazardous areas due to the fallout of a nuclear explosive by a message with the code word __________. FALLWARN MERWARN FALLOUT NUCLEAR
General information on enroute weather and climate is found in __________. the Sailing Directions and the Coast Pilot the Light List a weather fax the Local Notice to Mariners
You are preparing to take a tow from San Diego to Portland, OR. Good seamanship would require that you have on board, available for reference and use, all of the following EXCEPT the __________. Coast Pilot Light List Sailing Directions (Enroute) harbor and coastal charts for ports of refuge enroute
Which publication would NOT be used on a voyage from Houston to New York? Sailing Directions (Enroute) Coast Pilot Light List Radio Navigational Aids
The Sailing Directions (Enroute) contain information on __________. offshore traffic separation schemes port facilities well-charted inner dangers coastal anchorages
The Sailing Directions (Enroute) contain information on all of the following EXCEPT __________. outer dangers to navigation major port anchorages ocean currents tidal currents
The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________. coastal features military operating areas ocean routes ocean basin environment
The Sailing Directions are published in the Enroute format and the __________. Planning Guide Pilot format World Port Index Coastal editions
Information on search and rescue procedures and special, local communications used in Mexican waters will be found in the __________. Sailing Directions (Planning Guides) International Aeronautical and Maritime Search and Rescue Manual World Port Index International Code of Signals (Pub 102)
The Sailing Directions contain information on __________. required navigation lights currents in various locations casualty reporting procedures lifesaving equipment standards
Where would you obtain data on currents for areas of the world not covered by the
U.S. National Ocean Service?
In the Nautical Almanac In the Sailing Directions In the Coast Pilot In the List of Lights
Which publication requires infrequent corrections? Sailing Directions (Planning Guide) List of Lights Coast Pilot Radio Navigational Aids
What publication contains information about the port facilities in Cadiz, Spain? Sailing Directions World Port Index United States Coast Pilot Nautical Index
General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication? World Port Index Coast Pilot Sailing Directions Distances Between Ports
Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals? Approach charts Sailing charts General charts Coastal charts
A chart with a natural scale of 1:160,000 is classified as a __________.
coast chart
sailing chart

general chart harbor chart
A chart with a scale of 1:80,000 would fall into the category of a __________. harbor chart general chart sailing chart coastal chart
A chart with a scale of 1:45,000 is a __________. general chart harbor chart coast chart sailing chart
A general chart could have a scale of __________. 1:200,000 1:1,000,000 1:50,000 not more than 1:25,000
A sailing chart could have a scale of __________. not more than 1:25,000 1:35,000 1:100,000 1:700,000
A coastal chart could have a scale of __________. not more than 1:25,000
 
1:35,000 1:100,000 1:500,000
A harbor chart could have a scale of __________. 1:35,000 1:150,000 not less than 1:500,000 not more than 1:25,000
The scale on a chart is given as 1:5,000,000. This means that __________. 1 inch is equal to 5,000 inches on the Earth's surface 1 nautical mile on the chart is equal to 5,000,000 inches on the Earth's surface 1 inch is equal to 5,000,000 inches on the Earth's surface 1 nautical mile on the chart is equal to 5,000 inches on the Earth's surface
All straight lines represent great circle tracks on a chart based on a(n) __________. gnomonic projection polyconic projection orthographic projection Mercator projection
A Mercator chart is a __________. polyconic projection cylindrical projection rectangular projection simple conic projection
Which conic projection chart features straight lines which closely approximate a great circle? Lambert conformal Orthographic Stereographic Polyconic
When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________. the meridian midway between the ship and the object the meridian through the ship's position the meridian through the object of the bearing any meridian
In very high latitudes, the most practical chart projection is the __________. Mercator azimuthal Lambert conformal gnomonic
When navigating in high latitudes and using a chart based on a Lambert conformal projection, __________. distance cannot be measured directly from the chart a straight line drawn on the chart approximates a great circle the course angle is measured at the mid-longitude of the track line the chart should not be used outside of the standard parallels
Which statement about a gnomonic chart is correct?
Distance is measured at the mid-latitude of the track line.
A rhumb line appears as a straight line.

Parallels, except the equator, appear as curved lines. Meridians appear as curved lines converging toward the nearer pole.
On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a __________. spiral approaching the poles as a limit curved line concave to the equator loxodromic curve straight line
The only cylindrical chart projection widely used for navigation is the __________.
gnomonic Lambert conformal azimuthal Mercator
You wish to measure the distance on a Mercator chart between a point in latitude 42°30'N and a point in latitude 40°30'N. To measure 30 miles at a time you should set the points of the dividers at __________. 41°45' and 42°15' 42°00' and 42°30' 42°15' and 42°45' 41°15' and 41°45'
You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________. 41°30' and 42°00' 41°45' and 42°15' 42°00' and 42°30' 42°15' and 42°45'
Distance along a track line is measured on a Mercator chart by using the __________. latitude scale at the mid-latitude of the chart latitude scale near the middle of the track line latitude or longitude scale at the middle of the scale longitude scale near the middle of the track line
To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30 mile scale should be used? 32°15'N to 32°45'N 32°45'N to 33°15'N 33°00'N to 33°30'N 32°30'N to 33°00'N
Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent? 35°52'45" 51°39'00" 74°21'11" 82°36'12"
Which statement is TRUE concerning a Mercator projection? The mileage between the meridians is increased as the latitude increases. The length of the meridians is increased to provide for equal expansion in all directions. Degrees of longitude decrease in length as latitude increases. All of the above.
On a Mercator chart, 1 nautical mile is equal to __________. 1 degree of longitude 1 minute of latitude 1 degree of latitude 1 minute of longitude
What area of the earth cannot be shown on a standard Mercator chart? North and South Poles Equator Areas including both North and South latitudes A narrow band along the central meridian.