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   S
S (Sierra)
My engines are going full speed astern
SADCC
South African cooperation forum
SAFTA
South American Free Trade Association
SAR
Search and Rescue
SBT Segregated Ballast Tanks - tanks in a tanker solely used for ballast.
SBL
Seabed Logging Vessel
SDPO
Senior Dynamic Positioning Officer
SDR
Special drawing rights
SEATO South-East Asian Treaty Organization - defence alliance.
Seismic ship Vessel mapping gelogical structures in the seabed by firing air guns transmitting sound waves into the bottom of the sea. The ecco of the shot is captured by listening devices/hydrophones being towed behind the vessel. A seismic ship provides data which is an intrinsic part of the material determining if and when a test drilling should be initiated.
Semisubmersible Movable installation consisting of a deck on stilts, fastened to two or more pontoons. When in operation, the pontoons are filled with water and lowered beneath the surface. The installation is normally kept in position by a number of anchors, but may also be fitted with dynamic positioning equipment (DPE). Usually fitted with own propulsion machinery (max. water depths 600 - 800 metres).
SFT Statens Forurensningstilsyn - Norwegian Pollution Authority.
Shelterdeck
A deck above the vessel's main deck not included in the gross tonnage. Originally a lightweight structure to shelter the cargo on the main deck from adverse weather conditions. A closed shelterdecker is constructed to allow access through the hatches to the 'tweendeck, taking cargo on one or both levels.
Shipbroker Person who - on behalf of shipowner/shipper - negotiates a deal for the transportation of cargo at an agreed price. Shipbrokers are also active when shipping companies negotiate the purchasing and selling of ships, both secondhand tonnage and newbuilding contracts.
Short Sea Shipping Short distance international trade. Commonly used for trading between countries in the European Union.
Shuttle tanker Buoy-loader - see Oil tanker.
SIGGTO Society of International Gas Tankers and Terminal Operators
SIØS Senter for Internasjonal Økonomi og Skipsfart ved Norges Handelshoyskole i Bergen - Norwegian center for maritime economics (Bergen).
SIRE Ship Inspection Report Programme
SIU Seafarers' International Union (USA)
Slop chest
Goods stocked by the Chief Steward or Purser, sold for private use or consumption by the crew.
SOLAS Convention on Safety of Life at Sea (IMO, London)
Spotrate Rate for single voyage based on the market situation on the day.
SRF Sveriges Redareforening, Gothenburg - Swedish Shipowners' Association.
Stand-by Vessel Ship permanently stationed in the vicinity of an installation with the task of evacuating the rig-crew in an emergency. Also carrying out guard duty keeping other ships away from the installation.
STCW International Convention on Standards of Training, Certification and Watchkeeping (IMO, London)
Stevedore
Dockworker handling loading/discharging. Term also used on companies delivering such services.
STUFT Ships Taken Up From Trade - merchant vessels chartered by the military.
Submersible Movable installation constructed for drilling operations in shallow waters, where it is lowered until it rests on the seabed (max. water depth 30 - 40 metres).
Subsidiarity principle EU- rule that decisions should be taken on the lowest possible level, e.g. that any case should be decided nationally.
Suezmax The largest tank vessel which can pass through the Suez Canal fully loaded (120,000 -165,000 dwt.).
SUNAMAM Brazilian shipping organization representing the authorities.
Supercargo
Person employed by shipowner or shipping company/charterer of a ship or a shipper of goods to supevise cargo handling operations. Sometimes called Superintendent. The Supercargo was formerly enlisted as a crew member; now stationed in ports.
Supply ship Vessel transporting stores and equipment to drilling rigs or installations being built or in the production phase. Often called Straight Supply, or Platform Supply Vessel (PSV).
SUR Seafarers' Union of Russia, Moscow
SWATH Small Waterplane Area Twin Hull - fast and economical hull design, primarily used for highspeed ferries, etc.
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