SPECIMEN EXAMINATION 



FOR 



THIRD MATE 



2. LATITUDE BY MERIDIAN ALTITUDE METHOD. 



Enroute from Argentina to Cape- 

 town, a meridian altitude of the sun 

 was observed at D. R. Latitude 37°-02' 

 South with the sun bearing North. The 

 observed altitude was 75°-ll' and the 



declination was 23''-10'.6 South. 



Required: The Latitude at time of 

 sight. 



Candidates may use any method of 

 solution. 



3. RUNNING FIX-SUN. 



Enroute from New Orleans, La. to 

 Tampico, Mexico, in D. R. Latitude 

 25°-55' North, Longitude 93°-10' West, 



Observed Altitude (ho) Greenwich Hour Angle 



29°-20'.l 55°-37'.4 



an observation of the sun was taken 

 and the following data recorded: 



Declination 



22°-47'.0 S. 



The ship's course was 230°, speed 

 20.3 knots. At LAN a meridian altitude 



Observed Altitude (ho) 



41°-55'.7 



Required: The ship's position at Local 

 Apparent Noon. 



was taken and the following data re- 

 corded : 



Declination 



22°-46'.3 S. 



Enroute from Toledo, Ohio to Port of 

 Spain, Trinidad in D. R. Latitude 14°- 

 36' North and Longitude 62°-32' West 



an observation of the sun was taken and 

 the following data recorded : 



Observed Altittide (Ho) 



37°-28'.7 



Greenwich Hour Angle 



7°-48'.l 



Declination 



23°-01'.4 N. 



The ship's course was 165°, speed 11.7 

 knots. 3h-50m-13s after the a. m. ob- 

 servation, a p. m. observation of the 



Observed Altitude (Ho) Greenwich Hour Angle 



80°-16'.0 65°-20'.9 



Required: The ship's position at the 

 time of p. m. observation. 



sun was taken and the following data 

 recorded : 



Declination 



23°-00'.6 N. 



Candidates may use any method to 

 obtain solution. 



In the winter, the following 3 sextant 

 altitudes of the sun were obtained. The 

 height of eye was 65 feet, the sextant 



Observation No 



index error was 0'.5 on the arc in all 

 observations. Given: 



Sun Sext. alt. 8°-34'.2 



Bar. Pressure. 29.2 in. 



Temperature +20° F. 



Required: The observed altitude. 



Observation No. S 



31°-46'.8 

 1034 mb 

 -i-40° Celsius 

 (Centigrade) 



Observation No. S 

 (Upper Limb) 



49°-26'.7 

 30.0 in. 

 4-60° F. 



