What Is Your ETA?
AT 0800 zone time, on 15 april, your vessel is heading west in position LAT. 15?10? N, LONG. 165?15? W at a speed of 22 knots. The distance to your destination at LAT. 15?10?N, LONG. 135?15? E is 3600 nautical miles. What is your ETA???ANS: 2339, 22 APRIL
This is a question submitted from someone who is new to this blog. The answer according to his review material is 2339, 22 April. But when I tried to solve it, my answer is 0338H, 22 April. I'm going to show my solution.
Solution:
Step 1. Get the steaming time.
Time = Distance
Speed
= 3600 nm
22 nm/hr
= 3600
22
= 163.63636 hrs is the steaming time
163.63636 hr ÷ 24 = 6.81818 days
0.81818 days x 24 = 19.63632 hrs
0.63632 hrs x 60 = 38 mins
6 days 19 hours 38 mins steaming time
Step 2. Add steaming time to the time of departure. Add because your ship is east-bound.
15 0800 April
+ 6 day 19 hr 38 min
21 day 27hr 38 min April
+ 1 - 24
22 day 03 hr 38 min April
Simply put 0338H, 22 April as your ETA
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Sir, may i ask why did u add 1 and subtract 24 thankz
ReplyDeleteI get it now the 24 , imen the add 1
ReplyDeleteThere's no such time in your clock as 2738H isn't it? Or shall I say it this way -- 2738H is more than 1 day, right? That's why I subtract 24 hours of it which is equivalent of 1 day. Therefore, I have to add one day to the steaming time.
DeleteI hope this answer satisfies.
thankz a lot sir im fully undrstand now sir
Deletesorry but you forgot to change you zone time to zulu u have to solve this problem in zulu then change it back to local time
DeleteL to Z Let it be Z to L reverse the spell
I have another question sir:
ReplyDeleteA ship steers the following courses and distances:
080 T for 42 miles; 201 T for 36 miles
145 T for 27 miles; 045 T for 45 miles Calculate (using plane sailing) the course and distance made:
ANSWER: 099 T, 81 miles
THANKZ...
At 0600 zone time, on 22 october you depart Manila, LAT 14°46.0'N, LONG 118°11.0' W, with an estimated speed of advance at 20.2 knots. The distance is 6,385.9NM. What is the estimated zone time of arrival at Los Angeles? Ans 1008LT, 04 November
ReplyDeletemanila in lies at long East not WEST
DeleteThe answer should be; 3 Nov at 1808H
DeleteThere's a 16 hour gap between the two
ZD= - 8W(LA) - (+8)E (Manila)
= - 16 H
Wrong. Zone descript in west is (+) and east is (-). So the answer 1008LT, 04 NOV is correct.
DeleteWrong computation sir. U forgot time local time to utc to local time ✓ right answer is 22 APR 2338
ReplyDeletethis is the right anwer
Deletethis is correct, but the answer he gave on the question 2339 may be also right, it's just that he added the 1 minute on the zone description. kaya sya nagka ganun. 🤣🤣🤣
Deleteni round off na lang
Deletesir since the zone description is not given, you will get it by dividing the longitude to /15. Long 165*15*W/ 15 = (+11 W) then you will get the zone description of departure. LONG 135*15*E / 15 = (-9 E) zone description of arrival. after getting the given of both zone description, you will get the same answer with it.
ReplyDelete