PPT Pilot presentation indicator 



ppm Parts per million 



ppt Parts per thousand 



P/S Port/Starboard 



psf Pounds per square foot 



psi Pounds per square inch 



psia Pounds per square inch absolute 



psig Pounds per square inch gage 



PTC Personnel Transfer Capsule 



PVC Polyvinyl chloride 



R&D Research & Development 



RCC Rescue Control Center 



RFP's Request for proposals 



RH Relative humidity 



rms Root mean square 



rpm Revolutions per minute 



RQ Respiratory Quotient 



R/V Research Vessel 



SAR Search & Rescue 



SCA System Classification Authority 



SCF Standard cubic foot 



SCFH Standard cubic foot per hour 



SCFM Standard cubic foot per minute 



SHP Shaft horsepower 



SIT Silicon Intensifier Target 



SNAME Society of Naval Architects & Marine Engineers 



SOO Ship of Opportunity 



SPCC Strength, power, communication cable 



SRC Submarine Rescue Chamber 



SSB Single side band 



STAR Submarine Test & Research Vehicle 



STP Standard Temperature & Pressure 



SUBDEV- 



GRU-1 Submarine Development Group One 



SUPSAL Supervisor of Salvage 



TIP Transponder Interrogation System 



TPS Tandem Propulsion System 



TV Television 



UCLA University of California- Los Angeles 



UHF Ultra high frequency 



UQC Underwater telephone 



USCG U.S. Coast Guard 



USN U.S. Navy 



USNUSL U.S. Navy Underwater Sound Laboratory 



V Volt(s) 



VAC Volts alternating current 



VET Variable ballast tank 



VCB Verticle center of buoyancy 



VCG Vei-tical center of gi'avity 



VDC Volts direct current 



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