(3) Operating speeds 5 to 18 knots desired. 



(4) Include standard sensing modules. 



(5) Include a water meter device. 



1.4000 BIOTA OBSERVATION . 



1.4100 ECHO RANGING DEVICES. 



I. 4110 Fish Detector - Shipboard Mounted (37) 



Purpose: To detect schools and individual fishes at greater 

 ranges than presently attainable and permit determina- 

 tion of size and species of individual fishes and abun- 

 dance. 

 Specifications and requirements: 



(1) Manual and automatically trained transducers. 

 (Z) Transducer stabilized for roll of ship. 



(3) 360° transducer with PPI scope and chart recorder. 



(4) Range: to 100 m. , to 1, 000 m. , to maximum. 



(5) Spectrum) analyser circuit for target evaluation. 



1.4120 Fish Detector - Gear Mounted (26) 



Purpose: To determine the catching efficiency of fishing 



gear, particular ly trawls. 

 Specifications and requirements: 



(1) Remote recording via conducting cable. 



(2) Automatic 360 scanning normial to axis of trawl. 



(3) Range: to 100 m. 



(4) Operating depth: to 500 m. 



1.4130 Whale Detector - Tethered (1) 



Purpose: To count migrating gray whales. 



1.4200 WEIGHING DEVICES. 



1.4210 Shipboard Weighing Machine (4 modules). 



An accurate, rapid weighing machine for use on shipboard 

 to weigh objects of the following groupings: 



(1) to 50 g (25) 



(2) to 500 g (22) 



(3) to 5 kg (17) 



(4) to 50 kg. , all within ±1% with printed and 

 punched tape readout (16) 



1.4300 SPECIAL TELEVISUAL DEVICES 



432 



