PERISCOP

The PERISCOP is a pressurized recovery device designed for retrieving deep-sea marine life at depths exceeding 2,000 metres.^[1]: 881 The device was designed by Bruce Shillito and Gerard Hamel at the Universite Pierre et Marie Curie.^[2] The name is an acronym for the French phrase Projet d’Enceinte de Remontée Isobare Servant la Capture d’Organismes Profonds ("Enclosure project for isobaric ascent serving to capture deep organisms").^[1]

History[edit]

The PERISCOP is a unique pressurized recovery devices that contains three chambers – one for capture, one for recovery under exterior pressure, and one for transfer to the laboratory while maintaining pressure. Previous recovery devices used one chamber for all purposes.^[1]: 882 An arm designed to capture samples by force of suction is attached to the device.^[2] During ascent, pressure is maintained within the chamber by use of pressurized water.^[1]: 883 Upon surfacing, samples can be observed, filmed, and/or photographed through transparent view ports in the device.^[1]: 884 Due to fluctuations in atmospheric pressure and temperature recorded pressures during ascent and at the surface may ranged from 74%-111% of the natural pressure at sea depth.^[1]: 884 The device set a record for the deepest live-fish capture under pressure when it captured a Pachycara at 2,300 m.^[1]: 887 The previous record was 1,400 m.^[2] The capture was the first to be performed at a hydrothermal vent.^{[1]: 886 [2]} The device has also recovered several shrimp species (Mirocaris fortunata, Chorocaris chacei, and Rimicaris exoculata) at vent fields Lucky Strike and Rainbow.^[2]

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