trawl cables containing electrical conductors. 



(2) Usable to depth of 2, 500 meters. 



(3) Should be resistant to extreme shock and vibration. 



(4) Temperature range: -24 to 50 C. on deck and -2 

 to 35° C. when in use. 



(5) Limits of measurements: 



(a) Angles: to 45° and to 90°. 



(b) Distance between points: to 100 and to 200 m. 



(c) Speeds: 0-5, 0-10, and - 15 knots. 



(d) Tension: to 3 kg. , to 25 kg. , to 250 kg. , 

 and to 1,000 kg. 



2.0000 LABORATORY EQUIPMENT. 



2. 1000 PLANKTON ANALYSIS. 



2.1100 PLANKTON SEPARATOR AND COUNTER (21) 



Purpose: A device to separate and count a sample of 



living and/or dead plankton organisms on the basis of 

 size, density, and shape. 



2.1200 EGG SEPARATOR AND COUNTER (16) 



Purpose: To enumerate on the basis of size the abundance 

 of living and/or dead eggs of vertebrate or inverte- 

 brate animals in fresh or salt water samples. 

 Specifications and requirements: 



(1) To accommodate a variety of egg sizes and shapes 

 ranging in size from 0. 1 to 10 mm. in maximum 

 dimension. 



(2) Capable of use on shipboard. 



2.1300 SEDIMENT PARTICLE SIZE ANALYSER (13) 



Manufacture a device to analyse the sediment sample 

 according to particle size distribution. (A prototype has 

 been developed by Dr. T. J. Van Andle of Scripps Insti- 

 tution of Oceanography.) 



2.1400 SORTING DEVICE FOR BENTHIC ORGANISMS (15) 



A device that could be used aboard a vessel for sorting 

 bottom organisms from sediments. This device might 

 incorporate an electrical current or high density fluids. 



2.2000 MORPHOMETRIC ANALYSIS . 

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