N S/IQC/IN F-17 ^Continued) 



(g) Bottom sediments, A field description of each bottom 

 sample in accordance with the specifications in USHO 

 Publication No. 607, p. 155. 



(h) Bathymetry 



(i) The sounding at each station to be included 

 with the data under (c). 



(ii) For echo soundings the system preferred is an 

 overlay of the ship's track chart showing all 

 navigational fixes on a chart of scale about 

 1:400,000 (1:250,000 to 1:600,000) showing 

 soundings as closely spaced as they can 

 conveniently be written. If an overlay cannot 

 be furnished, tabulated soundings at an interval 

 of not more than 2i^ miles are desired. In 

 either case, full details of the assumed speed 

 of sound, corrections (if any) to sounding for 

 actual speed, and any corrections to frequency 

 standard are to be furnished. 



(iii) Original echograms will be handled similarly 

 to long wave records. Para, (b). 



(i) Bathythermography . Tabulations of temperatures at 



standard depths as on Form IBM 8180850, with data on 

 time, date, and location. 



( j ) Meteorology 



(i) Tabulated data for standard marine observations 

 of air temperature, ocean surface temperature , 

 absolute or relative humidity, speed and 

 direction :)f wind, barometric pressure, cloud, 

 visibility, and other atmospheric phenomena, 

 and precipitation. If scales used are not 

 explicit c.g.s. units, conversion tables should 

 be furnished, 



(ii) Upper air data. Radiosonde observations of 



temperature, humidity, and pressure using WMO 

 format. Speed and direction of wind with a 

 description of method used, 



(iii) Actinometry. Daily observations of the total, 



direct, diffused, and reflected radiation carried 

 out during daylight and the results of 24-hr 

 observations of effective radiation in selected 

 situations. 



