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Something electric and hydraulic. I assume the left hand side should be at the bottom. There seems to be a hand operated hydraulic pump to one of the 'things' and the other has a possible power pump with a vent pipe. The electric unit looks very like an old isolator and star delta starter unit....

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Something electric and hydraulic. I assume the left hand side should be at the bottom. There seems to be a hand operated hydraulic pump to one of the 'things' and the other has a possible power pump with a vent pipe. The electric unit looks very like an old isolator and star delta starter unit....

 

Adrian yes electric in the parallel wires & liquid in the solid pipe. Yes hand pump there, but not a power pump or starter.

Yes this is the correct orientation.

 

highpressurelatrine1837a_zps4968a0e2.jpg

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The transmitter on the right has an electro-mechanically controlled hammer on a steel diaphragm that is in contact with water in a tank secured to the ships hull. The rate was 3 blows per second.

 

The receiver on the left is a hydrophone linked to the hull in the same manner.

 

App3669b_zps610e970c.jpg

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