On 6 December your 0800 zone time DR position was LAT 21°48.0'N, LONG 124°30.0'E. Your vessel was steaming on course 045°T at a speed of 20.0 knots. An observation of the Sun's lower limb was made at 1012 ZT. The chronometer read 02h 10m 42s and was slow 01m 02s. The observed altitude (Ho) was 41°17.1'. LAN occurred at 1129 zone time. The observed altitude (Ho) was 44°53.7'. What was the longitude of your 1200 zone time running fix?

Question

Accepted Answer

Option B: LONG 125°35.2'E. Calculate the longitude of the 1012 ZT sun line using the intercept method. Advance this line to 1200 ZT using the vessel's course and speed. Combine this with the 1129 ZT meridian passage latitude to establish the running fix, resulting in a longitude of 125°35.2'E.