1.5800 THERMISTOR CPiAIN (cheaper and lighter than existing 



models) (12) 



Specifications and requirements: 



(1) Depth: to 200 m. 



(2) Operable to 15 knots. 



(3) Standard depth sensing module at end of chain. 



(4) Readout same as existing model. 



(5) Range and accuracy: -2° to 35° C. ±0.02°. 



1.5900 CURRENT METER (47) 



Purpose: To measure from shipboard, anchored buoy, or 



bottom mount the velocity of low currents. 

 Range and accuracy: 



(1) Speed: to 30 cm, /sec. ±1. 



(2) Direction accurate to ±5 . 

 Specifications and requirements: 



(1) Two types: 



(a) Self-contained data storage. 



(b) Telemetering. 



(2) For use singly or attached in series on a cable. 



(3) Depth: To 12, 000 m. 



(4) Temperature: -2° to 45° C 



1.6000 FISHING GEAR. 

 1.6100 TRAWLS. 



1. 61 10 Instruments for Gear Performance Studies . 



Purpose: To provide foundation for analysis leading to 



design of most effective capturing devices. 

 Instruments to measure: 



(1) Strain on netting and lines (immediate commercial 

 application). (21) 



(2) Vertical and horizontal net openings (21) 



(3) For hydrofoil and conventional trawl-door stu- 

 dies: angle of attack, angle of inclination, drag, 

 and separation distance (lift) (19) 



(4) Water velocity at the trawl (21) 



(5) Speed over bottom (21) 



(6) Total distance traveled (20) 



(7) Distance between points on trawl (20) 



Specifications and requirements: 



(1) Instantaneous readout on shipboard through use of 



437 



