Naval Skills Unit Four, Chapter Three: Time and Navigation

What is the name given to navigational timepieces designed for extreme accuracy and dependability?
1. Chronometer
2. Sextant
3. Stadimeter
4. Atomic Clock
5. A Barometer
Which of the following is the basic time used in fixing position by celestial navigation?
1. Greenwich Mean Time
2. Local Time Zone Time
3. Apparent Solar Time
4. Mean Solar Time
5. Solar System Time
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 Honolulu, Hawaii
2. Washington D.C. and Anchorage, Alaska
3. Anchorage, Alaska and Miami, Florida
4. Honolulu, Hawaii and New York City, New York
5. Paris, France and Honolulu, Hawaii
What do the term's AM and PM stand for?
1. Ante Meridiem and Post Meridiem
2. After Midnight and Prior to Midnight
3. Antes de Mediodía and Pre Mediodía
4. After Midday and Post Midday
5. Avant Midi and Pré Midi
What would 5:07 PM be in military time?
1. 1707
2. 0507
3. 1907
4. 1507
5. 1407
What would be 12:03 AM in military time?
1. 0003
2. 1203
3. 0103
4. 0203
5. 2403
In terms of AM and PM, what time would it be at 2104?
1. 9:04 PM
2. 9:04 AM
3. 7:04 PM
4. 7:04 AM
5. 11:04 PM
In terms of AM and PM, what time would it be at 0013?
1. 12:13 AM
2. 12:13 PM
3. 1:13 AM
4. 1:13 PM
5. 13:13 AM
While 0000 and 2400 are exactly the same time, it is common practice to start each day at ____ and end it at ____.
1. 0001, 2400
2. 0000, 2400
3. 0000, 2359
4. 0000, 2401
5. 0001, 2359
How long a time is there between the striking of bells during the work day onboard ships?
1. 30 minutes
2. 1 hour
3. 10 minutes
4. 15 minutes
5. 45 minutes
How many bells would be sounded at 0630 during the morning watch?
1. 5
2. 7
3. 9
4. 3
5. 4
How many bells would be sounded at 1500 during the afternoon watch?
1. 6
2. 5
3. 4
4. 8
5. 7
You are working during the first dog watch and you hear 3 bells. What time is it?
1. 1730
2. 1330
3. 1930
4. 2130
5. 1530
You are working the morning watch and you hear 7 bells. What time is it and how long before your watch ends?
1. 0730, a half-hour
2. 0530, one and a half-hours
3. 0830, three and a half-hours
4. 0330, a half-hour
5. 0230, one and a half-hour
Onboard ship, bells are not generally struck for time purposes between what two times?
1. 2200 and 0600
2. 2400 and 0800
3. 2100 and and 2100
4. 2400 and 0600
5. 2200 and 0800
How many degrees of arc around the Earth does the Sun appear to move each hour of the day?
1. 15
2. 30
3. 4
4. 1
5. 12
At the Equator, how long does it take the Earth to move one minute of arc and what is this distance?
1. 4 minutes, 1 nautical mile
2. 1 minute, 4 nautical miles
3. 1 minute, 1 nautical mile
4. 4 minutes, 4 nautical miles
5. 4 minutes, 60 nautical miles
Time measured by the Sun is known as what?
1. Solar Time
2. Mean Solar Time
3. Mean Time
4. The 24-Hour Clock
5. Greenwich Mean Time
What is "the equation of time"?
1. The difference between apparent time and mean time.
2. The formula used to adjust from local time to GMT.
3. The name of a nautical almanac that is used for celestial navigation at sea.
4. The relationship between degrees of arc on a globe and the rotation of the Earth.
5. The formula used to switch between 12 and 24-hour clocks.
What is another name for Universal Coordinated Time?
1. Atomic Time
2. Greenwich Mean Time
3. Zulu Time
4. Mean Solar Time
5. Apparent Time
What radioactive element is used as the standard for atomic clocks world-wide?
1. Cesium
2. Plutonium
3. Hydrogen
4. Helium
5. Selenium
What affect does Daylight Savings Time have on navigation at sea.
1. None. Daylight Savings Time is not observed at sea.
2. One hour must be added to the navigation solution in the Spring.
3. One hour must be subtracted to the navigation solution in the Spring.
4. One hour must be added to the navigation solution in the Fall.
5. During daylight hours, an hour must be added to the navigation solution.
Which one of the following is NOT one of the time zones found in the continental United States?
1. Alaska Standard
2. Eastern Standard
3. Central Standard
4. Mountain Standard
5. Pacific Standard
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 Tango
3. + 7 Uniform
4. + 8 Uniform
5. +6 Sierra
You are in Alaska and your Time Zone designation is +9 Victor. What is the Greenwich Mean Time (GMT) if it is 1000 local?
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?
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. 291700Z Mar 04
2. 290500Z Mar 04
3. 300100Z Mar 04
4. 291300Z Mar 04
5. 300500Z Mar 04
You've typed up a naval message and are ready to release it. You are in Alaska (+9 Victor) and the local time is 7:00 PM on 10 April, 2004. What is the correct Date/Time Group?