1. Junior Navigation Chapter 3
Sea Time
Quiz
Q & A
Junior Navigation
Chapter 3

2. 1. You are at Lo 60°23'W. Ship's time is kept in ZD 0
1. You are at Lo 60°23'W. Ship's time is kept in ZD 0. If you take a sight at by your watch set to ship's time, what is UT for this sight?
a the next day b c d

3. 2. ZT is 1758, 8 June. What are ZD and UT and date if you are at the following positions?
a. Lo 27° 43'W ZD ___ UT ___________
b. Lo 154° 38'E ZD ___ UT ___________
, 8 June
, 8 June

4. 3. UT is 0443, 27 September. What are ZT and date if you are at the following positions?
Lo 156° 14'E ZT _________________
b. Lo 003° 58'W ZT _________________
1443, 27 September
0443, 27 September

5. 4. One day last June, the sun rose at UT 0958 at Cape Fear, NC, and at UT 1238 at Huntington Beach Calif. If both places are at the same latitude, what is their approximate difference in longitude?
Difference in longitude is °40
Solution
Difference in time of Sun rise is 2 hours 40 minutes
2 hours at 15°/hour = 30°
+40 minutes at 4 minutes/° = 10°
Difference in longitude = 40°

6. 5. You have your radio set to receive station WWV
5. You have your radio set to receive station WWV. You listen to time ticks for a while and then hear a spoken message: “At the tone, XX hours zero minutes, Coordinated Universal Time". At the beginning of a short, high-pitch tone, you notice your watch reads What is your watch error?
Watch Error = 28 seconds slow

7. Junior Navigation Chapter 3
Sea Time
End of
Quiz Q & A
Junior Navigation
Chapter 3