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. The Composition of sea-water : comparative and descriptive oceanography. Seawater -- Composition. 500 [chap. 23 For many years, French marine scientists ( Tregouboff, 1955, 1956) have made use of the Galeazzi diving chamber aboard the research vessel Elie Monnier descending as deep as 300 m. The chamber is, of itself, buoyant and sinks because of an attached ballasting weight which can be jettisoned if the cable breaks. There is constant telephonic communication with the surface ship. The quiet clear waters of the Mediterranean make this region ideal for visual undersea PO
. The Composition of sea-water : comparative and descriptive oceanography. Seawater -- Composition. 500 [chap. 23 For many years, French marine scientists ( Tregouboff, 1955, 1956) have made use of the Galeazzi diving chamber aboard the research vessel Elie Monnier descending as deep as 300 m. The chamber is, of itself, buoyant and sinks because of an attached ballasting weight which can be jettisoned if the cable breaks. There is constant telephonic communication with the surface ship. The quiet clear waters of the Mediterranean make this region ideal for visual undersea POWER & TE CABLE - CAN SEARCH LIGH STROBE 500 W SEARCH SEARCH LIGHT TURN ELEVATING CONTRO TEL BOURDON TY PL DEPT HYDROPHONE RECE1V ADJUSTABLE MIRR SIX INCH OBSERVATION W INDO FREE GYRO (ELECTR OBSERVER SEARCH LIGHT POWER CONTROL CAMERA PEDESTAL FISH CATCHER REVOLVING CHAIR I 2) 'LOO MOTOR-GE FOR GYRO PROPULSION MOTOR SONAR TRANSDUCER TURNING GEAR STROBE LIGHT & SPOT L FOUR INCH OBSERVATION WINDOWS SWIVEL ADJUSTABLE SLINGS CH COVER COUNTER WEIGHT BMARINE-TYPE HATCH ROOM LIGHT INCH OBSERVATION WINDOW ISTANT IN SWITCHBOARD TELEPHONE OXYGEN BOTTLE OUR INCH OBSERVATION- WIN DOW ROBE-LIGHT CONTROLLER SONAR (ECHO-SOUNDER) MUD SAMPLING CONTROL FIN DUCT AS FISH RESERVOIR ^C ELEVATING RUDDER MUD SAMPLING DEVICE EMERGENCY RELEASING DEVICE BUOY ROPE (EMERGENCY LIFTING WIRE) SCREW PROPELLER WITH NOZZLE PROPULSION MOTOR STARTER TRANSFORMER BALLAST VENTILATING FAN AIR RECONDITIONING UNIT BEARING ROLLER (4) WOODEN BEARER Fig. 2. Outside view of the Japanese oceanographic research diving chamber, Kuroshio, completed in 1952 and subsequently extensively used in Japanese shelf waters to 200 m. (By courtesy of Richard Terry. ) 3. Bathysc&phs Since the completion of the prototype bathyscaph FNRS-2 in 1948, bathy- scaphs have remained the only operational untethered deep ships, so that somewhat fuller treatment is accorded them here. The FNRS-2 of A. Piccard successfully completed an
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