CN course

1
CN course

• Quiz on
• Time
• Section 6
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CN course Timesection 06
Quiz

• Q.1
• How much in arc does the mean sun move in
• (a) four minutes
• (b) one minute
• (c) four seconds

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CN course Timesection 06
Quiz

• Q.1
• How much in arc does the mean sun move in
• (a) four minutes
• (b) one minute
• (c) four seconds
• A.1
• (a) 1 in four minutes
• (b) 15 in one minute
• (c) 1' in four seconds
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CN course Timesection 06
Quiz

• Q.2
• An observer takes sights on the Gulf of Mexico at
  about ZT 2010. Is the Greenwich date at that time
  the same date, one day earlier or one day later ?

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CN course Timesection 06
Quiz

• Q.2
• An observer takes sights on the Gulf of Mexico at
  about ZT 2010. Is the Greenwich date at that time
  the same date, one day earlier or one day later ?
• A.2
• Gulf of Mexico stretches from approx. Lo 82W to
  Lo 97W,
• or ZD5 to ZD6.
• ZT 2010ZD5 500 GMT 0110
  One day later
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CN course Timesection 06
Quiz

• Q.3
• How can you determine the ZD of a particular
  location ?

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CN course Timesection 06
Quiz

• Q.3
• How can you determine the ZD of a particular
  location ?
• A.3
• Find its longitude and consult a time zone chart,
  or calculate the ZD by dividing the longitude by
  15
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CN course Timesection 06
Quiz

• Q.4
• How many zone descriptions are there and how many
  degrees of arc does each cover ?

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CN course Timesection 06
Quiz

• Q.4
• How many zone descriptions are there and how many
  degrees of arc does each cover ?
• A.4
• 24 zone descriptions of 15 longitude each
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CN course Timesection 06
Quiz

• Q.5
• Your destination is Montevideo, L 35 S, Lo 56
  W. Your vessel is located at L 35S, Lo 50 W, on
  a course of 270, with a time interval to
  dockside, at Montevideo, of 28 hours, 30 minutes.
  If your ZT now is 1415, what time will you be at
  dockside ?

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CN course Timesection 06
Quiz

• Q.5
• Your destination is Montevideo, L 35 S, Lo 56
  W. Your vessel is located at L 35S, Lo 50 W, on
  a course of 270, with a time interval to
  dockside, at Montevideo, of 28 hours, 30 minutes.
  If your ZT now is 1415, what time will you be at
  dockside ?
• A.5
• Montevideo Lo 56W i.e. ZD 4. Vessel at Lo
  50W i.e. ZD 3.
• ZT 1415 ships time, time in Montevideo is
• ZT 1415
• ZD 3 300
• GMT 1715
• ZD 4 400 (rev)
• ZT Montevideo 1315

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CN course Timesection 06
Quiz

• Q.5
• Your destination is Montevideo, L 35 S, Lo 56
  W. Your vessel is located at L 35S, Lo 50 W, on
  a course of 270, with a time interval to
  dockside, at Montevideo, of 28 hours, 30 minutes.
  If your ZT now is 1415, what time will you be at
  dockside ?
• A.5
• Montevideo Lo 56W i.e. ZD 4. Vessel at Lo
  50W i.e. ZD 3.
• ZT 1415 ships time, time in Montevideo is
• ZT 1415 ZT Montevideo 1315
• ZD 3 300 Travel time 2830
• GMT 1715 Arrival in 4145
• ZD 4 400 (rev) next day
  -2400
• ZT Montevideo 1315 Arrival Montevideo 1745
  next day
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CN course Timesection 06
Quiz

• Q.6
• At ZT 1415, on October 25, your vessel is in Lo
  W. One hour and 56 minutes later, your ship is in
  Lo 179 E. What is the ZT and date of the second
  position ?

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CN course Timesection 06
Quiz

• Q.6
• At ZT 1415, on October 25, your vessel is in Lo
  W. One hour and 56 minutes later, your ship is in
  Lo 179 E. What is the ZT and date of the second
  position ?
• A.6
• Assume Lo is about 179W
• ZT in Lo W 1415 Oct 25
• assume ZD12 1200
• GMT 2615 Oct 25
• GMT 0215 Oct 26
• GMT 0215 Oct 26
• ZD-12 -1200 (rev)
• ZT Lo E 1415 Oct 26
• travel 156
• Arrival 1611 Oct 26
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CN course Timesection 06
Quiz

• Q.7Reverse the positions of your ship as given
  in Question 6 and answer the same question.

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CN course Timesection 06
Quiz

• Q.7Reverse the positions of your ship as given
  in Question 6 and answer the same question.
• A.7Assume Lo is about 179E
• ZT in Lo E 1415 Oct 25
• assume ZD-12 -1200
• GMT 0215 Oct 25
• ZD12 1200 (rev)
• ZT Lo W 1615 Oct 24
• travel 156
• Arrival 1611 Oct 24
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CN course Timesection 06
Quiz

• Q. 8At ZT 1400, on September 4, you are on a
  course of 250 five miles east of Lo 67 30'W.
  One hour later, you are five miles west of Lo 67
  30' W. What is the ZT of your second position ?

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CN course Timesection 06
Quiz

• Q. 8At ZT 1400, on September 4, you are on a
  course of 250 five miles east of Lo 67 30'W.
  One hour later, you are five miles west of Lo 67
  30' W. What is the ZT of your second position ?
• A.8
• 5 miles East of 67 30W is ZD 4 5 miles West
  is ZD 5
• ZT (east of) 1400
• ZD 4 400
• GMT 1800
• ZD5 500 (rev)
• ZT (west of) 1300
• travel 100
• Answer 1400
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CN course Timesection 06
Quiz

• Q.9Reverse the positions of Your vessel as in
  Question 8 and answer the same question

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CN course Timesection 06
Quiz

• Q.9Reverse the positions of your vessel as in
  Question 8 and answer the same question
• A.9
• 5 miles WEST of 67 30W is ZD 5 5 miles East
  is ZD 4
• ZT (west of) 1400
• ZD 5 500
• GMT 1900
• ZD4 400 (rev)
• ZT (west of) 1500
• travel 100
• Answer 1600
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CN course Timesection 06
Quiz

• Q.10Repeat Question 8 and 9 using Lo 67' 3WE,
  and answer the same question

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CN course Timesection 06
Quiz

• Q.10Repeat Question 8 and 9 using Lo 67
  30E, and answer the same question
• (ZT 1400 start east of Lo 6730E heading west
  at 250)
• A.10
• (a) 5 miles east of 67 30E is ZD-5 5 miles
  west is ZD-4
• ZT (east of) 1400
• ZD -5 -500
• GMT 0900
• ZD-4 -400 (rev)
• ZT (west of) 1300
• travel 100
• Answer 1400
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CN course Timesection 06
Quiz

• Q.10Repeat Question 8 and 9 using Lo 67
  30E, and answer the same question
• (ZT 1400 start west of Lo 6730E heading east
  at 070)
• A.10
• (b) 5 miles west of 67 30E is ZD-4 5 miles
  east is ZD-5
• ZT (west of) 1400
• ZD -4 -400
• GMT 1000
• ZD-5 -500 (rev)
• ZT (west of) 1500
• travel 100
• Answer 1600
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CN course Timesection 06
Quiz

• Q.11How do you find the standard time in such
  places as Burma and Trinidad ?

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CN course Timesection 06
Quiz

• Q.11How do you find the standard time in such
  places as Burma and Trinidad ?
• A11
• Consult the Nautical Almanac, page 262, or a time
  zone chart of the world
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• End