Question 78Navigation Problems
70% to passOn 13 November at 0438 ZT, morning stars were observed and the vessel's position was determined to be LAT 22°14.0'S, LONG 79°23.0'E. Your vessel is steaming at 13.0 knots on a course of 242°T. A sextant observation of the Sun's lower limb is made at 0822 ZT. The chronometer reads 03h 20m 16s, and the sextant altitude (hs) is 45°49.7'. The index error is 1.0' on the arc, and the chronometer error is 01m 47s slow. Your height of eye on the bridge is 61.0 feet (18.6 meters). What is the azimuth (Zn) of this sight using the assumed position?
The correct answer is A) 092.6°T. To determine the azimuth (Zn) of the sun sight, we need to use the given information and apply celestial navigation principles. Based on the observed morning stars, the assumed position at 0438 ZT is LAT 22°14.0'S, LONG 79°23.0'E. The vessel is then steaming at 13.0 knots on a course of 242°T. At 0822 ZT, the sun's lower limb was observed with a sextant altitude (hs) of 45°49.7', an index error of 1.0' on the arc, and a chronometer error of 01m 47s slow. The height of eye on the bridge is 61.0 feet (18.6 meters). Using these inputs and applying the appropriate celestial navigation calculations, the azimuth (Zn) of the sun sight is determined to be 092.6°T. The other options are incorrect as they do not match the calculated value.
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