Question: what does s s stand for on a boat
Answer: supply vessel MSY Motor Sailing Yacht MT Motor Tanker MTS Marine Towage and Salvage / Tugboat MV ( M / V ) Motor Vessel ( interchangeable with MS ) MY Motor Yacht NB Narrowboat NRV NATO Research Vessel NS Nuclear Ship OSV Offshore supply vessel PS Paddle Steamer PSV Platform Supply Vessel QSMV Quadruple Screw Motor Vessel QTEV Quadruple Turbo Electric Vessel RMS Royal Mail Ship or Royal Mail Steamer RNLB Royal National Lifeboat RRS Royal Research Ship RV / RSV Research Vessel SB Sailing Barge SS ( S / S ) Single - screw Steamship ( also usage as generic term for any steamship ) SSCV Semi-Submersible Crane Vessel SSS Sea Scout Ship SSV Sailing School Vessel , Submarine and Special Warfare Support Vessel ST Steam Tug or Steam Trawler STS Sail Training Ship STV Sail Training Vessel or Steam Turbine Vessel SV ( S / V ) Sailing Vessel SY Sailing Yacht or Steam Yacht TB Tug boat TEV Turbine Electric Vessel TIV Turbine Installation Vessel TrSS Triple - Screw Steamship or steamer TS Training Ship or Turbine Steamship or Turbine steam ship T