Figure 16. Prototype ambient pressure water and plankton 

 sampler. This unit is adaptable to bathyscaph or cable- 

 lowered use. A single water and filtered plankton sample 

 can be acquired by remote control. Pressure within the 

 chamber can be maintained up to a maximum pressure of 

 1000 psi. Closure of the apertures can be effected either 

 mechanically by messenger or by an electrical solenoid. 

 Two viewing ports and openings for internal lighting are 

 available for viewing the contents while under pressure. 

 Exchange of water after closing can be effected in the 

 laboratory through high- pressure gates located on each 

 end of the pressure vessel. 



48 



