NS3-M3U4C1 Time & Navigation

Multiple Choice

The sun revolves around the earth.

• True

• False

Multiple Choice

Bells are rung aboard ship to indicate the hour, half hour and quarter hour of the day.

• True

• False

Multiple Choice

The ship's Boatswain's Mates make sure all the ship's clocks are indicating the correct time each day.

• True

• False

Multiple Choice

2:26 A.M. in civilian time is the same as 1426 in Navy time.

• True

• False

Multiple Choice

Time checks can be made by ships at sea by using the radio broadcasts transmitted from Washington, D.C. and Honolulu, Hawaii.

• True

• False

Multiple Choice

The ringing of 4 bells could indicate that the time was either 0200, 0600, 1000, 1400, 1800 or 2200.

• True

• False

Multiple Choice

The local mean time at the observatory in Greenwich, England, is called Greenwich mean time.

• True

• False

Multiple Choice

The seasons of the year are the result of the earth's rotation about its axis.

• True

• False

Multiple Choice

The Navy uses the 24-hour clock only because it is an old maritime custom.

• True

• False

Multiple Choice

Daylight saving time is simply zone time set ahead one hour to extend the time of daylight in the evening, usually in summer.

• True

• False

Multiple Choice

Setting the ship's clocks to the correct time, so that everyone aboard is using accurate time for log entries and messages, is a job assigned to the

• quartermasters

• boatswain's mate of the watch

• engineering officer

• radioman

Multiple Choice

A navigational timepiece of exceptional accuracy and fine construction is called a

• gimbal

• chronometer

• sextant

• stopwatch

Multiple Choice

When seven bells strike, the time indicated is

• 0730

• 1130

• 1530

• All of the above could be correct

Multiple Choice

The navigational instruments used to measure angles of altitude between the sun, or other heavenly bodies, and visible horizon is the

• sextant

• chronometer

• stopwatch

• telescope

Multiple Choice

In the Navy, half past nine in the morning and in the evening, respectively, are written as

• 9:30 AM and 9:30 P.M

• 09:30 AM and 9:30 P.M

• 0930 and 2130

• 0930 AM and 2130 P.M

Multiple Choice

Determining position by means of sightings of the sun, stars, planets, and moon is called

• piloting

• electronic navigation

• celestial navigation

• dead reckoning

Multiple Choice

A time honored custom aboard ship is to indicate the time for the crew between reveille and taps with the

• chronometer

• ship's bell

• ship's whistle

• ship's horn

Multiple Choice

Jet lag is a term used to illustrate

• a delay in flight of jet aircraft due to overcrowded air lanes.

• the effect of rapid time zone changes on the body due to increased speeds of modern aircraft.

• the relationship of the earth and the sun to time.

• All of the above answers are correct.

Multiple Choice

The difference between mean and apparent time is

• eliminated by tables.

• called the equation of time, and must be considered by navigators in certain parts of celestial navigation.

• too small to affect navigational safety.

• corrected by the establishment of standard time zones, west of the International Date Line approximately 180 degrees.

Multiple Choice

Because of the earth's rotation, the sun's apparent movement over the earth occurs at a rate of

• 15 degrees of arc in one hour

• 1 degree of arc in 4 minutes

• 15 degrees of longitude in one hour

• All of the above are correct

Multiple Choice

The four standard time zones in the continental United States from east to west are

• Pacific, Mountain, Central, and Eastern Standard times.

• Mountain, Pacific, Eastern, and Central Standard times.

• Eastern, Central, Mountain, and Pacific Standard times.

• Eastern, Mountain, Central, and Pacific Standard times.

Multiple Choice

Time measured by the sun -- that is, calculated from the apparent motion of the sun around the earth -- is called

• zone time

• local mean time

• solar time

• GMT

Multiple Choice

To eliminate the need to continually reset our watches to different local mean times as we move around in normal living in the community, the nations of the world established

• Greenwich mean time

• Eastern Standard Time

• universal coordinated time

• standard time zones

Multiple Choice

The time which is calculated on the basis of an imaginary sun moving around the earth in exactly 24 hours every day is called

• mean time

• Universal coordinated time

• apparent time

• atomic time

Multiple Choice

Starting from the Prime Meridian, standard time zones are numbered

• westward from 1 to 24.

• +1 to +12 west to the 180th meridian, and from -1 to -12 east to the 180th meridian.

• eastward from 1 to 24.

• from +1 to -12 east to the 180th meridian, and from -1 to +12 west to the 180th meridian.

Multiple Choice

If a naval message originated in Norfolk, Virginia (ZD=+5), at 2330 local time on 23 April 1997, what would the date-time group of that message be?

• 232330Z APR 97

• 240430Z APR 97

• 230430Z APR 97

• 231830Z APR 97

Multiple Choice

When the day is extended by one hour during the summer, we refer to this as

• Mountain Standard Time

• Pacific Standard Time

• daylight saving time

• Greenwich mean time

Multiple Choice

The zone description (ZD) at Greenwich is

• Alfa (A)

• Yoke (Y)

• Zulu (Z)

• November (N)

Multiple Choice

If it is 1600Z in New York City (ZD=+5), what is the local zone time there?

• 0800U

• 0900T

• 1000S

• 1100R

Multiple Choice

If it is 0900 in Norfolk, Virginia (ZD=+5), at the naval base, what time is it in San Diego, California (ZD=+8)?

• 0500

• 0600

• 0700

• 0800