Full access allows:
- Solve all tests online without limits;
- Remove all advertisements on website;
- Adding questions to favorite list;
- Save learning progress;
- Save results of practice exams;
- Watching all wrong answered questions.
- Homepage »
- Master & Chief Mate (Oceans or Near Coastal (Unlimited Tonnage)) »
- Q109 - Navigation Problems: Oceans
309. On 28 October at 1754 ZT, your vessel's DR position is LAT 28° 30' N, LONG 63° 24' W. At this time, you obtain a sextant altitude (hs) of Polaris reading 28° 42.6', with an index error of 2.4' on the arc. Your chronometer reads 09h 50m 00s, and is 4m 14s slow. What is your latitude by Polaris, given a height of eye of 28 feet (8.5 meters)?
The correct latitude is determined by correcting the sextant altitude of Polaris for index error, dip, and refraction, then using the Nautical Almanac's Polaris tables to apply a correction based on the date, time, and longitude.
Comments (0)
There are no comments at the moment. If you found an error or think question is incorrect, tell everyone about it
Only signed in users can write comments
Signin