MERMAID lll/IV 



LENGTH: 6.2 m 



BEAM: 1.8 m 



HEIGHT: 2.7 m 



DRAFT: NA 



WEIGHT (DRY) 10.5 tons 



OPERATING DEPTH: 200m 



COLLAPSE DEPTH: NA 



LAUNCH DATE: 1975 



HATCH DIAMETER; main hull 0.6 m 



HATCH DIAMETER: lock-out 0.7 m 



LIFE SUPPORT (MAX): 120 man-hr 



TOTAL POWER: 36 kWh 



SPEED (KNOTS): CRUISE NA 



MAX 2/1 hr 



CREW: PILOTS 2 



OBSERVERS 2 



PAYLOAD: NA 



PRESSURE HULL: Composed of two cvlinders of high tensile steel (St S3. 7) both with hemispherical endcaps and joined by a cylindrical chamber. 



The forward cylinder operates at atmospheric pressure; the after cylinder operates at ambient pressure and is equipped for diver lock-out. 



BALLAST/BUOYANCY: NA. 



PROPULSION/CONTROL: Main propulsion is from a 10-kW, stern-mounted hydraulically-actuated propeller continuously variable in speed and 



reversible. Two lateral thrusters of 1-kW each are mounted fore and aft, provisions can be made to also incorporate vertical thrusters. 



TRIM: NA. 



POWER SOURCE: Same as MERMAID l/ll. 



LIFE SUPPORT: Same as MERMAID l/ll for the atmospheric (forward) cylinder. He/02 supply for the divers consists of four flasks of 50-1 



capacity (each). 



VIEWING: Nine plastic viewports. Five in conning tower of 170-mm diam. and two of 80-mm diam. Four viewports in lock-out chamber of 70-mm 



diam. The bow can be fitted with two or three viewports or one large plastic hemisphere. 



OPERATING/SCIENTIFIC EQUIPMENT: UQC, depth gage, echo sounder, compass. 



MANIPULATORS; None. 



SAFETY FEATURES: No data available, but is assumed equal to that of MERMAID l/ll. 



SURFACE SUPPORT: SOO. 



OWNER: International Underwater Contractors, New York City. 



BUILDER: Bruker-Physik A.G. Karlsruhe, West Germany. 



REMARKS: These are two identical lock-out submersibles. MERMAID lll/IV is scheduled to be operational by 1975. 



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