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- Q135 - Navigation Problems: Oceans
172. On 17 January your 0730 zone time position was LAT 22° 26.0' N, LONG 152° 17.0' E. Your vessel was steaming on course 136° T at a speed of 17.0 knots. An observation of the Sun's lower limb was made at 1015 ZT. The chronometer read 00h 13m 23s and was slow 01m 49s. The observed altitude (Ho) was 40° 25.7'. LAN occurred at 1222 zone time. The observed altitude (Ho) was 47° 48.1'. What was the longitude of your 1200 zone time running fix?
The correct longitude for the 1200 zone time running fix is 153 13.1' E. This result is obtained by advancing the 1015 Sun line and retarding the LAN line along the vessel's track, which intersects at this longitude, close to the dead reckoning longitude.
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