Description: Tasks for navigation Task number: A1.1 Topic: Celestial Navigation Acti :Work out a sight using meridian altitude of sun. Minimum number of times that activity should be performed: 4 (2 each phase) Sample calculation: (Latitude by meridian altitude- Sun) On 4th April 1998, in DR position 35°10'N 148°18'E, the sextant meridian altitude of the Sun's lower limb was 60°10.3'. If IE was 2.2' off the arc, and HE was 12 meters, find the latitude and the position line. Sext alt: IE (off): Obs alt: (+) 60° 10.3' 02.2' 60° 12.5' Dip (12m): (-) 06.1' App alt: Tot com LL: (+) 60° 06.4° 15.4' T alt: 60° 21.8' S (Named same as azimuth) MZD: 29° 38.2' N (Named opposite to T alt) LMT Mer Pass: 04d 12h 03m 00s LIT (E): (-) 09h 53m 12s GMT Mer Pass: 04d 02h 09m 48s Dec (04d 02h): 05° 33.8' N d (0.9): (+) 00.1' Dec: 05° 33.9' N MZD: 29° 38.2' N Lat: 35° 12.1' N PL: E-W If MZD and Dec are of same name- add and retain name. If they are of opposite names, subtract the smaller one from the larger one and retain the name of the larger one.

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