Naval Skills Units 4 & 5 Practice Exercise

How many seconds of arc are in one degree of arc?
1. 120
2. 60
3. 1,200
4. 1000
5. 100
How many nautical miles would there be in three degrees, 20 minutes of latitude?
1. 3.2 NM
2. 200 NM
3. 320 NM
4. 20 NM
5. You measure distance from degrees of longitude, not latitude.
What do celestial navigation systems use to determine fix locations?
1. Celestial navigation systems do not require outside sources of reference. They are all self-contained systems.
2. A constellation of 24 GPS satellites
3. Dead reckoning plots.
4. Heavenly bodies such as the Sun, Moon and selected stars and planets.
5. Several Loran transmitters located throughout the world.
Which type of buoys consist of upright wooden poles or tubes of steel?
1. Bell buoys
2. Spar buoys
3. Nun buoys
4. Gong buoys
5. Can buoys
Why do some lights have sectors of red glass placed in their lanterns?
1. To show danger bearings.
2. To allow for more easy recognition at night.
3. So that white light is seen only from the water and not from the land.
4. To allow for more easy recognition during the day.
5. Navigational lights never have sectors of glass painted red.
What is the name of the instrument common on larger ships which always points toward true north?
1. A parallel
2. A meridian
3. A gyrocompass
4. A cartographer
5. A sextant
Unlighted structural aids to navigation are called what?
1. Light Towers
2. Daymarks
3. Daybeacons
4. Lighthouses
5. Channel Markers
Which of the following would be the correct Date/Time Group (DTG) for a message written at 5:00 PM Zulu time at San Diego (+8 Uniform) on the 29th of March, 2004?
1. 290500Z Mar 04
2. 291300Z Mar 04
3. 291700Z Mar 04
4. 300500Z Mar 04
5. 300100Z Mar 04
What international body is the parent organization of the International Maritime Organization (IMO)?
1. The International Court of Justice at the Hague
2. The United Nations
3. NATO
4. The International Merchant Marine
5. The European Union
You are working during the first dog watch and you hear 3 bells. What time is it?
1. 1330
2. 2130
3. 1730
4. 1930
5. 1530
What type of flashing light is normally found on a red and white vertically striped safe-water buoy?
1. An interrupted quick-flashing light
2. A quick-flashing light
3. A flashing light which flashes at not more than thirty flashes per minute.
4. A fixed light
5. A Morse A flashing light
In terms of AM and PM, what time would it be at 0013?
1. 13:13 AM
2. 1:13 PM
3. 12:13 AM
4. 1:13 AM
5. 12:13 PM
At the Equator, how long does it take the Earth to move one minute of arc and what is this distance?
1. 1 minute, 1 nautical mile
2. 4 minutes, 1 nautical mile
3. 4 minutes, 60 nautical miles
4. 1 minute, 4 nautical miles
5. 4 minutes, 4 nautical miles
What is the difference between whistle signals in U.S. inland waters and those sounded in international waters?
1. In international waters they are required signals, They are not required in U.S. Inland Waters.
2. There is no difference. Whistle signals are required and have the same meaning in both systems.
3. In U.S. inland waters, they signal intention only. In international waters, they signal execution.
4. In U.S. inland waters they are required signals. They are not always required in international waters.
5. In U.S. inland waters, they signal execution. In international waters they signal intention only.
If unlighted, red right-hand channel buoys must be what type of buoys?
1. Can buoys
2. Lighted buoys
3. Spar buoys
4. Bell buoys
5. Nun buoys
What is the common abbreviation for The International Regulations for Preventing Collisions as Sea?
1. U.S. Inland Rules
2. Rules of the Road
3. International Rules
4. Navigational Rules Act of 1980
5. COLREGS
Green and red horizontally banded buoys are known as what?
1. Preferred-channel buoys
2. Spar buoys
3. Nun buoys
4. Safe-water buoys
5. Bell buoys
Proper lights must be shown by all vessels from _______ to __________.
1. Sunset to sunrise
2. One hour prior to sunset to one hour after sunrise
3. Sunrise to sunset
4. 2200 - 0600
5. 0600 - 2200
One dark night you notice the lights of a supertanker at sea. You see a single white light. Which of the following statements is TRUE?
1. The ship is crossing from left to right.
2. The ship is heading directly away from you.
3. You cannot tell which general direction the ship is moving with only this amount of information.
4. The ship is crossing from right to left.
5. The ship is heading directly towards you.
You are in Washington D.C. and your Zone Time designation is +5 Romeo. Someone tells you that it is 1700 GMT. What is your local 24-hour time?
The white light on the aftermast is called what?
1. The range light
2. The port sidelight
3. The after sidelight
4. The masthead light
5. The starboard sidelight
Where can you find the Earth's northernmost magnetic pole?
1. In north-central Russia
2. In northern Canada
3. In northern Alaska
4. In central Greenland
5. Along the Canadian-Alaskan border.
Which of the following is NOT one of the advantages of using radar for navigation?
1. It has a long-range capability.
2. It can be used at night and during periods of low visibility.
3. A fix can be obtained from a single object.
4. It is very accurate and rapid.
5. It can be used to locate and track storms.
Informational buoys are cylindrical white buoys with what additional color markings?
1. Orange
2. Black
3. Yellow
4. Red
5. Green
Radio stations in two locations broadcast time signals every five minutes to help mariners maintain accurate time at sea. Where are these radio stations located?
1. Washington D.C. and Anchorage, Alaska
2. Honolulu, Hawaii and New York City, New York
3. Paris, France and Honolulu, Hawaii
4. Washington D.C. and Honolulu, Hawaii
5. Anchorage, Alaska and Miami, Florida
Which type of buoys are shaped like a cylinder, much like an oil drum?
1. Nun buoys
2. Gong buoys
3. Spar buoys
4. Can buoys
5. Bell buoys
On a dark night you notice the lights of another ship directly ahead of you. You see a red light on the left and a white light on the right. What direction is this ship heading relative to your ship?
1. Directly away from you
2. Right to left
3. Straight towards you
4. Left to right
5. It is impossible to determine this given you can only see two lights.
Time measured by the Sun is known as what?
1. Solar Time
2. Mean Time
3. Greenwich Mean Time
4. The 24-Hour Clock
5. Mean Solar Time
How many bells would be sounded at 1500 during the afternoon watch?
1. 7
2. 6
3. 4
4. 8
5. 5
On nautical charts, what units are used to show the depth of water?
1. Fathoms or meters only
2. Feet, fathoms or meters.
3. Feet, yards and fathoms
4. Feet or fathoms only
5. Feet, inches and fathoms
What do you call the intersection of two or more lines of position (LOPs) obtained at the same time?
1. A visual range
2. A distance arc
3. A fix position
4. A stadimeter
5. A fix
The angular difference between true north and magnetic north is known as what?
1. The Mercator Angle
2. The Magnetic Bearing
3. The Variation Angle
4. The Distortion Angle
5. The Relative Bearing
What is the name commonly given to the 180th meridian?
1. The International Date Line
2. The Great Circle
3. The Greenwich Meridian
4. The Equator
5. The Prime Meridian
What is "the equation of time"?
1. The name of a nautical almanac that is used for celestial navigation at sea.
2. The relationship between degrees of arc on a globe and the rotation of the Earth.
3. The formula used to adjust from local time to GMT.
4. The difference between apparent time and mean time.
5. The formula used to switch between 12 and 24-hour clocks.
Of the general patterns of flashes of navigational lights, which type have two or more off periods at regular intervals?
1. Flashing
2. Group flashing
3. Group occulting
4. Occulting
5. Fixed
Which of the following is not a published, standard distress signal?
1. The national ensign hoisted upside down.
2. At night, flames from a burning tar or oil barrel.
3. The radiotelephone voice signal "Mayday".
4. A flaghoist flying the flags November Charlie (NC)
5. The daytime continuous sounding with any fog signal apparatus, or firing a gun.
While 0000 and 2400 are exactly the same time, it is common practice to start each day at ____ and end it at ____.
1. 0000, 2400
2. 0001, 2359
3. 0000, 2401
4. 0001, 2400
5. 0000, 2359
Lines that divide the globe into two equal parts, or hemispheres, are called what?
1. Great Circles
2. Meridians
3. Equators
4. Parallels
5. Prime Meridians
If the Eastern Standard Time Zone has a designation of +5 Romeo, what is the Mountain Standard Time Zone's designation?
1. + 7 Tango
2. + 8 Uniform
3. + 7 Uniform
4. +6 Sierra
5. + 8 Tango
In a crossing situation, the power vessel having the other to starboard is _____________.
1. The crossing vessel
2. The stand-on vessel
3. The overtaking vessel
4. The stand-off vessel
5. The give-way vessel
If you are sailing southward along the East Coast of the U.S. in the intercoastal waterway, what color and numbering of costal buoys would you expect to see on the starboard side of the ship?
1. Yellow and even-numbered
2. Green and odd-numbered
3. Red and odd-numbered
4. Green and even-numbered
5. Red and even-numbered
Which term below describes a navigational system made up of radio signals broadcast by groups of land-based transmitting stations at known positions?
1. Sonar
2. SINS
3. GPS
4. Radar
5. Loran
Which of the following is NOT a proper combination for obtaining a accurate fix?
1. Two or more lines of bearing
2. A distance arc and a line of bearing
3. Two or more distance arcs
4. A visual range
5. A visual range and a distance arc
Which of the following is NOT one of the standard ways of determining the direction of an object from an observer?
1. Relative bearing
2. Magnetic bearing
3. These are all valid methods of determining the direction of an object from an observer.
4. A visual range
5. True bearing
You are in Alaska and your Time Zone designation is +9 Victor. What is the Greenwich Mean Time (GMT) if it is 1000 local?
Green or red channel buoys would NOT have which of the following lights?
1. All of these types of lights can be found on green or red channel buoys
2. A fixed light
3. A flashing light
4. A quick-flashing light
5. A Morse A flashing light
Running lights carried by all seagoing power-driven vessels come in all of the colors listed below EXCEPT _________.
1. Blue
2. Green
3. Red
4. White
5. All of these are required colors on seagoing power-driven vessels.
How many bells would be sounded at 0630 during the morning watch?
1. 9
2. 7
3. 5
4. 4
5. 3
What is the shortest distance of travel between two points on the Earth (or any globe)?
1. A straight line
2. The equator
3. A parallel
4. A meridian
5. A great circle
Which of the following is a plotting instrument used for measuring chart distances along a suitable scale on a chart?
1. A Compass Rose
2. A Protractor
3. A Parallel Ruler
4. A Divider
5. A Plotter
Under international rules, when a vessel is not at anchor, moored or aground it is considered to be ____________.
1. Steaming
2. Moving
3. Under way
4. Adrift
5. Running
What affect does Daylight Savings Time have on navigation at sea.
1. None. Daylight Savings Time is not observed at sea.
2. During daylight hours, an hour must be added to the navigation solution.
3. One hour must be added to the navigation solution in the Spring.
4. One hour must be added to the navigation solution in the Fall.
5. One hour must be subtracted to the navigation solution in the Spring.
When in dense fog, what is the difference between hearing a whistle and a bell?
1. Whistles are only used by ships whereas bells are on buoys.
2. A whistle indicates the ship is anchored. A bell indicates it is moving.
3. A whistle indicates the ship is moving. A bell indicates it is anchored.
4. A whistle indicates a power-driven vessel whereas a bell indicates a ship over 100 meters in length
5. A whistle indicates the other ship has you in sight, whereas a bell indicates they do not.
The upper white lights on a ship must be visible from at least _____ miles. Port and starboard sidelights, as well as the stern light, must be visible from at least _____ miles.
1. 10, 2
2. 5, 10
3. 5, 2
4. 10, 5
5. 2, 5
How are dredging areas normally marked?
1. Green and red horizontally banded buoys
2. Red and white vertically striped buoys
3. White buoys with green tops
4. Yellow buoys
5. With black and white horizontal striped buoys
What type of light would you find at a turning point or junction where special caution is required?
1. Flashing
2. Morse A flashing
3. Fixed
4. Quick-flashing
5. Interrupted quick-flashing
What instrument determines the depth of water under the ship's keel?
1. A loran
2. A fathometer
3. A sextant
4. A stadimeter
5. SINS
Under international rules, the ship that has the responsibility to keep clear of the other vessel is called what?
1. The overtaking vessel
2. The give way vessel
3. The crossing vessel
4. The meeting vessel
5. The stand on vessel
A ship showing two red lights, one over the other, is in what condition?
1. Under way
2. Not under command
3. Moored
4. Anchored
5. Towing another vessel
Which of the headings below is NOT considered a cardinal point?
1. 90 degrees
2. 270 degrees
3. 200 degrees
4. 000 degrees
5. 180 degrees