INSTRUCTIONS TO MARINE METEOROLOGICAL OBSERVERS 33 



Code table for Y {day of the toeek) 



Day 



Sunday 



Monday... 

 Tuesday. -- 

 Wednesday 

 Thursday. _ 



Friday 



Saturday... 



Code 

 figures 



Octant of globe (Q). — The correct entry in this column is deter- 

 mined by the position of the ship with respect to the equator and to 

 the meridian of Greenwich. The proper code figure is obtained from 

 the accompanying table. 



Code table for Q (octant of the globe) 



Lorgitiie 



North latitude: 



0° W. to 90° W... 



90° W. to 180° W 



180° E. to 90° E_. 



90° E. toO° E.-.. 

 South latitude: 



0° W. to 90° W._. 



90° W. to 180° W 



180° E. to90° E.. 



90° E. toO° E__.. 



Code 

 flaures 



Latitude [LLL) and longitude {III). — In these columns should 

 be recorded the latitude and longitude of the A^essel at the actual 

 time of the meteorological observation. Three figures should al- 

 ways be entered in each column. No code table is necessary for these 

 entries. 



In the LLL column the first two figures to be recorded are the 

 latitude in whole degrees. If the latitude is less than 10°, a (zero) 

 should be entered as the first figure. The third figure is the fraction 

 of a degree of latitude, Avhich is recorded in tenths of a degree, and 

 not in minutes of arc. The tenths are obtained by dividing the 

 minutes of arc by 6 and neglecting the remainder. (Examples: (a) 

 latitude 42°38' N. is coded 426; (b) latitude 10°20' N. is coded 103.) 

 The differentiation between north and south latitude is shown by the 

 figure for Q in the preceding column. 



In the 111 column the longitude is recorded in degrees and tenths 

 in the same manner as for the latitude. If the longitude is 100°, or 

 more, the first figure, 1, should be dropped. (Examples: (a) longi- 

 tude 46°22' W. is coded 463; (b) longitude 123°41' W. is coded 

 236.) The differentiation between longitudes less than 100° and 

 greater than 100° and also between east and west longitude is shown 

 by the figure entered in the Q column. 



The columns for latitude and longitude should always be filled 

 out to the best of the observer's ability, even though astronomical 

 observations or radiocompass bearings have not been obtained. 



