SPECIMEN EXAMINATION 



FOR 



SECOND MATE 



1. LATITUDE BY POLARIS. 



On 25 July 1958 in D. R. Longitude 

 160°-03' West, Polaris was observed at 

 morning twilight to have a sextant al- 

 titude of 49°-02' and a bearing of 002° 

 by gyro-compass. The chronometer read 

 2h-18m-12s. The chronometer was fast 



6 minutes and 4 seconds. The sextant 

 error was 1' off the arc. The height of 

 eye was 25 feet. 

 Required : 



The latitude at time of sight. 

 The gyro-compass error. 



2. LATITUDE BY MERIDIAN ALTITUDE METHOD. 



Alpheratz is observed on the meridian 

 bearing South with an observed alti- 

 tude of 75°-03'.8. Declination of Al- 

 pheratz is 28°-51'.l North. 



Required: The latitude at time of 

 sight. 



Show all work. 



3. FIX OR RUNNING FIX. 



Enroute from Naples, Italy to the 

 Dardanelles, in D. R. Latitude 36°-21' 

 North and Longitude 19°-45' East, four 

 celestial bodies were observed. Given 



Body Observed Altitude 



VEGA 29°-03'.4 



DUBHE 56°-48'.0 



SPICA 42°-38'.l 



ALPHECCA 59°-59'.2 



the following information on the celes- 

 tial bodies, determine the ship's posi- 

 tion. 



Greenwich Hour Angle 



260°-38'.7 



14°-20'.8 



338°-57'.9 



306°-81'.6 



Candidates may use any method of solution. 



Declination 



38°-44'.5N, 

 61°-59'.4N. 

 10°-56'.2 S. 

 26°-51'.7 N. 



4. STAR IDENTIFICATION (any method). 



On 18 March 1956, at Latitude 

 15°-08' South, Longitude 64°-19' East, 

 an evening observation is taken at 14h- 

 32m-44s GMT of a star whose cor- 

 rected altitude is 43°-02'.7 and whose 



azimuth is 338°. 5 True. 



Required: Identify the star. 



Candidates may use any method of 

 solution. Show all work. 



Given: No 1 



Alpheratz 



Date 7 January 1958 



GMT lh-14m-37s 



Long 125''-36' West 



Required: The meridian angle and 

 declination of the star in each of the 

 3 cases. Indicate whether the star is 



No. 2 



Ankda 



12 January 1958 

 12h-39m-53s 

 05°-27' East 



No. 3 

 Schedar 



17 January 1958 



18h-03m-49s 



02°-58'East 



East or West of the Meridian in each 

 case. 



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