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Glossary

Maritime glossary, terms beginning with T (page 4)

All maritime glossary terms that begin with the letter T, drawn from every subject section. 2313 entries.

Showing 250 of 2313 terms (page 4 of 10).

TFDE X56. LNG/LPG Carriers and IGC Code
Tri-Fuel Diesel-Electric propulsion using medium-speed engines capable of running on natural gas, marine diesel oil, or heavy fuel oil.
TFDE (Tri-Fuel Diesel Electric) X20. LNG Operations and Custody Transfer
Wartsila 50DF or MAN 51/60DF engines burning HFO, MGO, and gas with electric propulsion.
TFG X127. Maritime Security, Anti-Piracy and PMSCs
Transitional Federal Government of Somalia 2004 to 2012, replaced by FGS, consenting state for UNSCR 1816 high-seas operations.
TFG Marine X72. Bunkering Hubs and Bunker Suppliers
Bunker supply joint venture established in 2020 by Trafigura and Frontline plus Golden Ocean, operating physical supply in ARA, Houston, Gibraltar, Panama, Las Palmas, and Singapore.
TFG Marine Algeciras X72. Bunkering Hubs and Bunker Suppliers
TFG Marine office in Algeciras with APBA bunker license.
TFG Marine Houston X72. Bunkering Hubs and Bunker Suppliers
TFG Marine office in Houston with bunker barge operations on the ship channel.
TFG Marine Singapore X72. Bunkering Hubs and Bunker Suppliers
TFG Marine office in Singapore with MPA bunker supplier license.
TG-6000 X89. ECDIS and Bridge Equipment Makers
Tokyo Keiki GMDSS console family.
TG-8000 X89. ECDIS and Bridge Equipment Makers
Tokyo Keiki gyrocompass type approved for SOLAS use.
TG-8500 X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS
Tokyo Keiki fiber-optic gyrocompass providing heading and rate-of-turn outputs to bridge systems.
TGE Marine X20. LNG Operations and Custody Transfer
OEM of small-scale LNG carriers and Type C tank systems with onboard PBU.
TGI-1 X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS
Tokyo Keiki spinning-mass gyrocompass commonly fitted on Japanese-built merchant vessels.
TGN Atlantic X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
Transatlantic submarine cable system operated by Tata Communications, in service since 2001.
TGN cable system X122. Submarine Cable Laying, Repair Vessels and Operators
Tata Global Network, including TGN-Atlantic, TGN-Pacific and TGN-Intra Asia, operated by Tata Communications.
TGN Pacific X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
Trans-Pacific cable system operated by Tata Communications.
TGS Refining X116. Global Bunker Anchorages, Hubs and Supply Infrastructure
Refinery operating tankage at Houston Pasadena feeding bunker barges in the Houston Ship Channel.
TGS-NOPEC X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
Geophysical company providing subsurface data used in pipeline routing in major basins.
Thai Marine Department X98. Ship Registries and Flag States
Flag administration of the Kingdom of Thailand for ship registration matters.
Thai Union Group X131. Commercial Fisheries, Trawler Fleets and Seafood Processors
Bangkok-listed canned and chilled tuna and shrimp giant, owner of Chicken of the Sea, John West, Petit Navire, Mareblu and King Oscar.
Thailand PSC X66. Port State Control and Regional MOUs
Tokyo MOU member State.
Thaioil Marine X72. Bunkering Hubs and Bunker Suppliers
Bunker arm of Thaioil supplying bunkers at Sriracha and Laem Chabang.
Thalassa X128. Sail Training Ships and Tall Ship Associations
Dutch three masted topsail schooner built 1980 at IJlst as fishing vessel and rebuilt 1984, 47 m length, operates Northern European and Arctic sail training.
Thalassa FPSO X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels
Generic FPSO naming reference example used in Mediterranean projects.
Thalassiosira pseudonana X18. Ballast Water, Biofouling and Antifouling
Diatom used in BWMS challenge studies.
Thales X91. Submarines and Submarine Cable Systems
French defense electronics prime supplying sonars, periscopes, and combat systems for European submarines.
Thales TSM 2022 Mk II X77. Naval Mine Warfare and Mine Countermeasures
A hull-mounted minehunting sonar used on several European MCMVs.
Thales TSM 2023N X77. Naval Mine Warfare and Mine Countermeasures
A hull-mounted minehunting sonar fitted to mine countermeasures vessels of Tripartite lineage.
Thales Type 2093 X77. Naval Mine Warfare and Mine Countermeasures
A variable-depth minehunting sonar fitted to the Royal Navy Sandown-class.
Thallium Compounds NOS X75. IMDG Code, Classes, Packing and Segregation
UN 1707, Class 6.1.
Thalweg (channel) X10. Marine Biology, Fisheries and Oceanography
Line of lowest elevation along a channel.
Thames Tonnage X39. Pre-1900 Maritime History
The English shipping tonnage measurement formula in use until superseded by the Moorsom system in 1854.
Thanet X42. Offshore Wind Installation and Cable Lay
UK offshore wind farm off Kent operated by Vattenfall.
Thaw hole X27. Polar Code, Ice Navigation and Polar Operations
Hole in the surface of melting sea ice.
THC X6. Container, Intermodal and Trade Codes
Terminal Handling Charge, fee covering port operations on a container.
THD X67. Marine Electrical Systems and Shore Power
Total harmonic distortion, expressed as a percentage of the fundamental voltage or current.
The Big 5 X119. Maritime Conferences, Trade Shows and Awards
Annual Dubai construction trade fair with maritime infrastructure pavilion.
The Crown Estate X105. Offshore Wind Farm Installation and Vessels
UK landowner that leases offshore seabed for wind energy projects in English and Welsh waters.
The Digital Ship CIO Forum X119. Maritime Conferences, Trade Shows and Awards
Annual digital shipping conference in London and Singapore.
The Italian Sea Group X125. Superyacht Industry, Builders and Brokers
Holding of Admiral, Tecnomar, Perini Navi, Picchiotti, and Columbus brands, listed in Milan since 2021.
The Marine Society X102. Seafarer Welfare and Maritime Charities
UK seafarers' charity founded 1756 by Jonas Hanway, now part of MSSC.
The Maritime Executive recycling tables X147. Ship Recycling, Hong Kong Convention, and Recycling Yards
Industry trade publication tracking recycling sales volumes and yard activity.
The Maritime Standard Awards X119. Maritime Conferences, Trade Shows and Awards
Annual awards held at Atlantis The Palm, Dubai, since 2014.
The Nautical Institute X55. Marine Simulators, Training and Maritime Academies
International professional body for navigators, also accrediting DP, ECDIS, and pilotage schemes.
The Ocean Race X84. Yacht Racing, Regattas and Sailing Governance
The current name of the round-the-world crewed offshore race, in use since the 2019 edition.
The Sea, The Sea F2. Maritime Culture, Heritage, Archaeology, Art and Museums
1978 Booker-winning novel by Iris Murdoch with maritime themes.
The Seafarers' Charity X102. Seafarer Welfare and Maritime Charities
Renamed Seafarers UK from 2021, principal UK grant-maker for seafarer welfare.
Theater X24. Cruise, Passenger Ship and Ferry Operations
Main show lounge on cruise ships, typically 1,000 to 1,400 seats.
Theater ASW Commander E2. Naval, defence and maritime law enforcement
Region-level ASW authority.
Theater Security Cooperation (TSC) E2. Naval, defence and maritime law enforcement
Engagement with partner navies.
Themba X124. Dredging Industry and Reclamation Contractors
Boskalis split hopper barge.
Theodolite X16. Nautical Science, Navigation and COLREGs
Surveying instrument for horizontal and vertical angles.
Theodore alarm X19. Engine Room Watchkeeping and UMS Operations
Older brand of integrated alarm system, replaced by ICMS suites.
Theodore Roosevelt (USS) CVN-71 X106. Naval Surface Combatants
Fourth Nimitz-class aircraft carrier, commissioned 1986.
Theoretical Maximum Density X75. IMDG Code, Classes, Packing and Segregation
Concept not directly used in IMDG but underlies bulk cargo trim and stability checks.
Theoretical spreading rate X45. Marine Paints, Coatings and Antifouling
Area covered by a unit volume of paint at the specified DFT, ignoring losses.
Therapeutic Recompression X82. Saturation Diving and Offshore Diving Operations
Treatment recompression of a DCS casualty.
Therapy Table X82. Saturation Diving and Offshore Diving Operations
Recompression table such as US Navy Table 6 used for DCS treatment.
Therese X109. Maritime Autonomous Surface Ships and MASS Code
One of the ASKO Maritime autonomous electric container barges operating in the Oslofjord.
Thermal break X26. Reefer Containers and Cold Chain Logistics
Insulating gasket reducing conductive heat transfer at door and corner posts.
Thermal Conductivity Analyzer X82. Saturation Diving and Offshore Diving Operations
Sensor measuring helium fraction by gas thermal conductivity.
Thermal Decomposition X75. IMDG Code, Classes, Packing and Segregation
Process driving Class 5.2 organic peroxide hazards.
Thermal imaging X59. Offshore Wind O&M, CTVs and SOVs
See infrared thermography.
Thermal Imaging Survey X5. Marine Surveying and Inspection
Use of IR camera to detect hotspots on machinery or insulation.
Thermal Inertia D1. Physical and chemical oceanography and marine meteorology
Resistance of a material such as the ocean mixed layer to temperature change.
Thermal insulation X56. LNG/LPG Carriers and IGC Code
Layered insulation system maintaining cryogenic cargo temperature and minimizing BOR.
Thermal Insulation Inventory X50. Ship Recycling, Demolition and Hong Kong Convention
The IHM Part I record of thermal insulation materials, including potential asbestos and man-made mineral fibers.
Thermal management (Polar Code) X27. Polar Code, Ice Navigation and Polar Operations
Personal protective clothing required to keep all persons warm for the MERT.
Thermal oil heater X19. Engine Room Watchkeeping and UMS Operations
Heater using diathermic oil for cargo heating, common on chemical tankers.
Thermal Oil Heating X93. IBC Code and Chemical Tanker Operations
Cargo heating method using a circulating heat transfer fluid rather than saturated steam, supplied to tank coils or external heaters.
Thermal oil system X19. Engine Room Watchkeeping and UMS Operations
Closed circuit with expansion tank and circulation pump.
Thermal Overload Relay X67. Marine Electrical Systems and Shore Power
Bimetallic device protecting marine motors from sustained overcurrent.
Thermal oxidation X2. Marine Bunker Fuels, Lubricants and Bunkering Operations
Lube oil degradation pathway under high-temperature exposure.
Thermal protective aid (TPA) X27. Polar Code, Ice Navigation and Polar Operations
Bag or suit reducing heat loss in the water; LSA Code item required for polar.
Thermal spray aluminum X165. Marine Coatings, Antifouling, and Hull Husbandry
A spray-on metallic coating providing long-life corrosion protection in offshore splash zones and exhaust uptakes.
Thermal spray aluminum (TSA) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling
Coating for offshore structures.
Thermal stability X47. Marine Fuel Quality and ISO 8217
Resistance of fuel to chemical change on heating in the fuel system upstream of injection.
Thermal stratification X10. Marine Biology, Fisheries and Oceanography
Layering of the water column by temperature.
Thermal treatment X18. Ballast Water, Biofouling and Antifouling
Heating ballast to lethal temperatures, used by pasteurization BWMS.
Thermo King X26. Reefer Containers and Cold Chain Logistics
US-headquartered reefer unit manufacturer (Trane Technologies), MAGNUM and MAGNUM PLUS lines.
Thermo King Magnum 2.0 X26. Reefer Containers and Cold Chain Logistics
Updated Magnum reefer with energy and pharma performance enhancements.
Thermo King Magnum Plus X136. Reefer Vessels and Cool Chain Operators
Reefer container model from Thermo King designed for deep freeze cargoes, sustaining set points to minus 40 degrees Celsius.
Thermo King Super Freezer X136. Reefer Vessels and Cool Chain Operators
Specialty Thermo King reefer unit reaching minus 70 degrees Celsius for sashimi tuna and pharmaceuticals.
Thermocline D1. Physical and chemical oceanography and marine meteorology
Vertical zone with rapid temperature change in the upper ocean.
Thermocouple X19. Engine Room Watchkeeping and UMS Operations
Type K or Type J sensor measuring exhaust temperature.
Thermography X19. Engine Room Watchkeeping and UMS Operations
Infrared survey of electrical and mechanical equipment for hot spots.
Thermohaline Reference F5. The Reference Layer: Glossary, Units, Signals and Information Sources
Oceanographic data reference used in routing.
Thermometer (digital) X36. Shipboard Medical, Telemedicine and Seafarer Health
Oral or tympanic electronic thermometer replacing mercury devices.
THERMOPTIM X54. Naval Architecture Software and IACS Rules
Thermodynamic cycle analysis tool sometimes interfaced with marine machinery design.
Thermostat X19. Engine Room Watchkeeping and UMS Operations
Self acting valve regulating temperature, used on JW outlet to mixing valve.
Thermostatic expansion valve (TXV) X26. Reefer Containers and Cold Chain Logistics
Mechanical refrigerant metering device, largely replaced by EEV.
Thermostatic valve X19. Engine Room Watchkeeping and UMS Operations
Three way valve on cooling water diverting flow between cooler and bypass.
Theta Decay X44. Shipping Indices, FFAs and Freight Markets
Concept from options on FFAs describing the loss of time value as expiry approaches.
THETIS A7. Compliance, certification and enforcement
EMSA-operated PSC database used by Paris MoU.
THETIS-EU A7. Compliance, certification and enforcement
PSC tool for EU directives such as Directive 2009/16/EC.
THETIS-MED X7. Flag State, Port State Control and Detention Vocabulary
EMSA-hosted system supporting the Mediterranean MoU.
THETIS-S X66. Port State Control and Regional MOUs
Module supporting Sulfur compliance under EU Directive 2016/802.
Theyr X78. Voyage Optimization and Vessel Performance Software
A meteorological data and weather routing services provider working with maritime customers.
Thialf X42. Offshore Wind Installation and Cable Lay
Heerema semi submersible crane vessel with twin 7,100 t cranes, used on offshore substation and foundation installation.
Thialf, SSCV X167. Major Salvage Companies, Wreck Removals, and Equipment
Heerema dual crane semisubmersible with 14,200 tonne combined lift capacity, used on major offshore and wreck lifts.
Thick first-year ice X27. Polar Code, Ice Navigation and Polar Operations
First-year ice greater than 120 cm thick.
Thickness gauge X45. Marine Paints, Coatings and Antifouling
Magnetic or eddy current gauge used to measure dry film thickness.
Thickness Measurement X54. Naval Architecture Software and IACS Rules
In-service hull gauging required by IACS UR Z10 for ship surveys.
Thickness Measurement (TM) X5. Marine Surveying and Inspection
Ultrasonic thickness gauging by approved firm.
Thickness Measurement Survey X43. Marine Surveying and Warranty Surveying
An ultrasonic gauging programme by approved firms to determine remaining steel thickness for class and special surveys.
Thimble X3. Ship Handling, Seamanship and Deck Vocabulary
Grooved metal ring in an eye splice.
Thin first-year ice X27. Polar Code, Ice Navigation and Polar Operations
First-year ice 30 to 70 cm thick.
Thin-Line Array X91. Submarines and Submarine Cable Systems
Slim towed array sonar enabling deployment from smaller stowage.
ThinKom X68. Maritime Satcom and Telecommunications
American manufacturer of phased array antennas used in some mobility applications including maritime trials.
ThinLine X136. Reefer Vessels and Cool Chain Operators
Carrier Transicold reefer container unit with reduced size machinery, freeing extra payload space.
Thinner X45. Marine Paints, Coatings and Antifouling
Solvent supplied by the coating manufacturer for use only at recommended dilution.
Thinning (ice) X27. Polar Code, Ice Navigation and Polar Operations
Recent decline in Arctic ice thickness driven by warming.
Thionyl Chloride X75. IMDG Code, Classes, Packing and Segregation
UN 1836, Class 8 corrosive liquid Packing Group I.
Third Mate X21. STCW Certificates, Crewing and Seafarer Welfare
Junior deck officer holding STCW II/1 CoC.
Third Officer F3. Seafaring Life, Education, Professions and Institutions
Deck officer typically responsible for safety equipment.
Third Party Funder X51. Maritime Arbitration, Law and BIMCO Clauses
An entity financing a party's legal costs in return for a share of any recovery.
Third Rate X39. Pre-1900 Maritime History
Royal Navy ship of the line typically of seventy to eighty guns, the backbone of the battle fleet.
Thirteenth District X130. National Coast Guards and Cutter Fleets
USCG district headquartered Seattle, Washington, covering Pacific Northwest.
Thomas Cook X124. Dredging Industry and Reclamation Contractors
Generic historic shipowner reference.
Thomas Cooper X114. Maritime Arbitration and Shipping Law Firms
London admiralty law firm founded in 1825 with offices in London, Paris, Madrid, Piraeus, Sao Paulo, and Singapore.
Thomas Miller X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets
London-based mutual insurance manager for the UK Club, TT Club, ITIC, UK Defence Club, and Hellenic War Risks.
Thomas Reuter X82. Saturation Diving and Offshore Diving Operations
Common manufacturer reference for diving bell umbilicals.
Thome Bunker X116. Global Bunker Anchorages, Hubs and Supply Infrastructure
Bunker procurement function within Thome Group ship management.
Thompson Dock X113. Drydock and Ship Repair Yards
Belfast graving dock built for the Olympic-class liners and still operated within the Harland & Wolff site.
Thor X123. Offshore Wind Installation Vessels and Operators
1,000 MW Danish wind farm under construction, RWE operated, Siemens Gamesa SG 14-236 DD turbines, due 2027.
Thorco Projects X81. Project Cargo, Heavy-Lift and Module Carriers
Project cargo arm of Thorco Shipping.
Thorco Shipping X81. Project Cargo, Heavy-Lift and Module Carriers
Copenhagen-based multipurpose and project carrier operator.
Thordon COMPAC X38. Propellers, Stern Gear and Shaft Lines
Thordon Bearings polymer water-lubricated stern-tube bearing, widely used for seawater-lubricated installations.
Thordon SXL X38. Propellers, Stern Gear and Shaft Lines
Thordon non-metallic bearing used in intermediate and rudder applications.
Thordon Thorshield X38. Propellers, Stern Gear and Shaft Lines
Thordon shaft cladding system protecting the shaft in seawater-lubricated installations.
Thornton Bank X42. Offshore Wind Installation and Cable Lay
Belgian offshore wind farm including the first commercial concrete gravity base offshore wind installation.
THP/SL Trailer X104. Project Cargo Forwarders and Heavy Transport
Goldhofer modular trailer family widely used in project transport.
THR X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS
Transmitting Heading Repeater, used in INS architectures to distribute heading data.
Thrane and Thrane X68. Maritime Satcom and Telecommunications
Danish satellite terminal manufacturer now part of Cobham SATCOM.
Threat Actor X25. Maritime Cybersecurity, OT and IT
Individual or group conducting cyber attacks.
Threat Hunting E1. Maritime security, geopolitics and risk
Proactive cyber-defense practice in OT/IT networks.
Threat Intelligence X107. Maritime Cybersecurity and OT Security
Curated information on adversaries, their tools, techniques, and procedures used to inform defense.
Threat Intelligence Platform X48. Maritime Cybersecurity
System for collecting, enriching, and disseminating cyber threat intelligence.
Threat Model X48. Maritime Cybersecurity
Structured representation of relevant threats to a shipboard system or process.
Three Gorges Renewables X123. Offshore Wind Installation Vessels and Operators
Chinese state-owned operator of multiple Jiangsu and Guangdong offshore wind clusters.
Three Gorges Ship Lift X33. Inland Navigation and Barge Operations
Vertical ship lift at Three Gorges Dam on the Yangtze with 3,000 ton lift capacity.
Three Gorges Ship Lock X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping
The two-way, five-step lock at the Three Gorges Dam, opened 2003, lifting vessels of up to 10,000 t through 113 m in about four hours.
Three Gorges Ship Locks X33. Inland Navigation and Barge Operations
Twin five-step lock flights at the Three Gorges Dam.
Three Lines of Defense X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents
A governance model adopted by many shipping companies for cyber risk, with operations, oversight, and audit roles.
Three Phase Four Wire System X67. Marine Electrical Systems and Shore Power
Distribution arrangement with a distributed neutral, used in low-voltage marine lighting subsystems.
Three Phase Three Wire System X67. Marine Electrical Systems and Shore Power
Standard ungrounded marine main bus arrangement requiring an insulation monitoring device.
Three Sea Area Model X80. Maritime Search and Rescue Coordination
A1, A2 and A3 areas before A4 was added in GMDSS modernization.
Three Tier Response X60. Marine Salvage and Wreck Removal
Industry framework dividing oil spill response into Tier 1, 2, and 3 capabilities.
Three way valve X19. Engine Room Watchkeeping and UMS Operations
Valve splitting or combining flow, common on freshwater cooling.
Three-arbitrator tribunal X152. Maritime Arbitration and Dispute Resolution
Standard LMAA composition with two party-appointed arbitrators and a third (chair) appointed by the two co-arbitrators.
Three-blade propeller X38. Propellers, Stern Gear and Shaft Lines
Common on small craft and high-speed propellers, offering high efficiency at moderate disc loading.
Three-Cargo-Hold Model X54. Naval Architecture Software and IACS Rules
FEM model extent prescribed by CSR-BC+OT for direct strength analysis of bulk carriers.
Three-Cargo-Tank Model X54. Naval Architecture Software and IACS Rules
FEM model extent prescribed by CSR-BC+OT for direct strength analysis of oil tankers.
Three-coat system X45. Marine Paints, Coatings and Antifouling
Common marine coating system of primer, intermediate, and topcoat.
Three-Compartment Sink X41. Cruise Ship Public Health and VSP/USPH
Wash, rinse, and sanitize basin sequence required wherever mechanical ware-washing is unavailable.
Three-Country Threshold X28. Ship Recycling and End-of-Life
HKC Article 17 entry-into-force criterion requiring 15 states and 40 percent global tonnage.
Three-dimensional measurement B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling
Photogrammetry for hull alignment.
Three-Element Control X63. Marine Auxiliary Machinery and Pumps
Boiler drum level controller using drum level, feed water flow, and steam flow signals.
Three-Fourths Collision Liability X4. Marine Insurance, P&I and Claims
ITC Hulls 1/10/83 clause 8 covering 75% of collision liability, with the remaining quarter falling to P&I.
Three-Layer Polyethylene Coating (3LPE) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
External corrosion coating widely used on submarine pipelines.
Three-Member Panel X114. Maritime Arbitration and Shipping Law Firms
Tribunal of three arbitrators preferred for higher-value LMAA, SCMA, and SMA cases.
Three-phase, 60 Hz X26. Reefer Containers and Cold Chain Logistics
Standard reefer power, 380 to 460 V depending on terminal or vessel.
Three-Point Securing X9. Cargo Securing, Lashing and Stability Vocabulary
Triangular securing pattern for cylindrical cargo.
Three-Screw Pump X63. Marine Auxiliary Machinery and Pumps
Screw pump with one driving and two driven rotors, popular for fuel oil booster duty.
Three-Stage Cleaning, Pre-Recycling X50. Ship Recycling, Demolition and Hong Kong Convention
The yard-level segregation of pre-cleaning, cutting, and waste handling activities under MEPC.211(63).
Three-strand Rope X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral
Classical rope construction with three twisted strands, used for general seamanship and lighter lines.
Three-Wide Tow X103. US Inland Waterway Towing and Barge
A tow configured three barges across and multiple barges long, the standard Upper Mississippi configuration.
Three-Year Rolling Average X146. Port State Control Regimes, MoUs, and Inspection Systems
The reference period for calculating Paris MoU and Tokyo MoU flag State and RO performance.
Thresher shark X10. Marine Biology, Fisheries and Oceanography
Large pelagic shark of the genus *Alopias* with elongated upper caudal lobe.
Threshold A2. Maritime safety legislation: SOLAS and its codes
For example 500 GT or 24 m length, used in SOLAS application provisions.
Threshold draft X15. Ports, Terminals and Stevedoring
draft below which a vessel may transit without tide window.
Throttle valve X19. Engine Room Watchkeeping and UMS Operations
Restricting valve on steam or hydraulic lines.
Throttling Valve X103. US Inland Waterway Towing and Barge
A cargo manifold valve used to control loading or discharge rates.
Through bill of lading C3. Logistics, freight forwarding and multimodal trade
BL covering multi-leg journey.
Through Bills of Lading X143. Landmark Maritime Law Cases and Doctrines
Multimodal carriage bills, with COGSA application addressed in Norfolk Southern v Kirby, 543 US 14 (2004).
Through Transit Insurance X4. Marine Insurance, P&I and Claims
warehouse-to-warehouse cargo cover.
Through-Water Communications X82. Saturation Diving and Offshore Diving Operations
Acoustic comms with untethered divers.
Throughput X68. Maritime Satcom and Telecommunications
Effective data rate delivered to a customer across a satellite link.
Throughput Capacity X69. EGCS Scrubbers, SCR and Marine Air Emissions
Maximum exhaust mass flow that an EGCS or SCR is certified to handle.
Throw Bag X22. Piracy, Maritime Security and Armed Protection
Floating line used during recovery of crew or boarding teams.
Throw drawing X58. Shipbuilding Yards and Construction
Reference drawing showing centerline references for block alignment.
Thrust bearing X19. Engine Room Watchkeeping and UMS Operations
Kingsbury type bearing taking propeller thrust into hull.
Thrust block X3. Ship Handling, Seamanship and Deck Vocabulary
Bearing absorbing propeller thrust.
Thrust collar X38. Propellers, Stern Gear and Shaft Lines
Forged collar on the shaft transferring axial load to the thrust pads.
Thrust deduction fraction (t) B1. Naval Architecture
(T - R)/T reduction of effective thrust on the hull.
Thrust deduction t X38. Propellers, Stern Gear and Shaft Lines
Fraction by which propeller-induced pressure reduction increases hull resistance; T(1 - t) = R_T at self-propulsion.
Thrust horsepower (THP) X38. Propellers, Stern Gear and Shaft Lines
Power equivalent T V_a in the propeller open-water frame.
Thrust load (tidal turbine) X57. Ocean Energy Beyond Wind
Axial force on a tidal stream rotor, a key structural design parameter for foundations.
Thrust meter X38. Propellers, Stern Gear and Shaft Lines
Strain-gauge or laser-based thrust measurement device used in shop and sea trials.
Thrust pad X19. Engine Room Watchkeeping and UMS Operations
Tilting pad element in thrust bearing.
Thrust pad temperature monitor X38. Propellers, Stern Gear and Shaft Lines
Resistance thermometer in each thrust pad, alarm-tripped to protect against pad wipe.
Thrusters X14. Offshore Oil and Gas Marine Operations
Azimuth or tunnel propellers used in DP stationkeeping.
Thwart X3. Ship Handling, Seamanship and Deck Vocabulary
Athwartship seat in a boat.
Thyboron Trawldoor X131. Commercial Fisheries, Trawler Fleets and Seafood Processors
Danish trawl door manufacturer dominant in pelagic and demersal trawling.
Thyssen-Waas bow X27. Polar Code, Ice Navigation and Polar Operations
Icebreaking bow form developed by Thyssen-Waas with wide, downward angled stem.
ThyssenKrupp Industrial Solutions X94. Port Machinery and Quay Equipment Makers
German engineering group supplying conveyor systems, stockyard machinery, and shiploaders.
ThyssenKrupp Steel Europe X92. Marine Steel Suppliers and Shipbuilding Plate
German integrated steel producer with main works at Duisburg.
TIA (Terror Insurance Additional) E1. Maritime security, geopolitics and risk
AP for terror-affected listed area calls.
Tian Jing Hao X124. Dredging Industry and Reclamation Contractors
CCCC self-propelled CSD of 21,000 kW, used in South China Sea reclamation.
Tian Kun Hao X124. Dredging Industry and Reclamation Contractors
CCCC self-propelled CSD of 25,800 kW total installed, the largest in Asia, delivered 2019.
Tianjin Dredging Company X175. Port Engineering, Dredging, Breakwaters, and Quays
Major dredging company based in Tianjin within the CCCC group, active in Bohai Bay and overseas projects.
Tianjin Maritime College X121. Maritime Education, Academies and Universities
Tianjin Maritime Vocational College, founded 1958, Chinese ratings and officer college.
Tianjin Maritime Simulator X144. Bridge Simulators, Engine Room Simulators, and Maritime Training Equipment
Dalian Maritime University and Shanghai Maritime University both operate Kongsberg and Transas full-mission bridges.
Tianjin Mengwang Group X100. Marine Cathodic Protection and Anodes
A major Chinese manufacturer of aluminum sacrificial anodes for the marine and offshore market.
Tianjin Pilots X159. Marine Pilotage, Pilot Districts, and Pilots' Associations
Tianjin Pilotage Station serving the northern Chinese gateway port and the approach channel to Beijing.
Tianjin Plant X83. ISO Container Manufacturing and Leasing
CIMC, DFIC, and Singamas reefer container plants located in Tianjin.
Tianjin Port X138. Global Container Terminal Operators and Port Equipment
Bohai Bay facility operated by Tianjin Port Holdings, world's eighth busiest box port at 22.2 million TEU in 2023.
Tianjin Port Cyber Incident X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents
Various reports of localized IT disruption in 2020 affecting terminal operations.
Tianjin Xingang X164. Cruise Industry, Brands, Ship Classes, and Terminals
The cruise port serving Beijing at the Tianjin International Cruise Home Port, operated by Tianjin Port Group.
Tick Size X44. Shipping Indices, FFAs and Freight Markets
Minimum price increment for cleared FFA contracts as defined by the relevant exchange rulebook.
Tick-borne encephalitis vaccine X36. Shipboard Medical, Telemedicine and Seafarer Health
Recommended for crews working in Northern European and Russian forested coasts.
Tickler Boiler X63. Marine Auxiliary Machinery and Pumps
Informal term for a very small auxiliary boiler used for limited steam supply.
Tickler Chain X87. Fishing Vessels and Fisheries Management
Chain dragged ahead of the ground rope or beam trawl to stimulate flatfish.
Ticonderoga class X11. Naval Vessels, Warship Systems and Naval Architecture
USN CG-47 Aegis cruiser, twenty-seven built.
Ticonderoga-class cruiser X106. Naval Surface Combatants
US Navy guided-missile cruiser class of 27 ships, lead ship USS Ticonderoga CG-47 commissioned 1983.
Tidal barrage X57. Ocean Energy Beyond Wind
Civil engineering structure that uses a dam fitted with low-head turbines to harness tidal range, as at La Rance and Sihwa.
Tidal Bore D2. Hydrography, tides, waves, bathymetry and marine geology
Wave that travels upstream against the river current with a rising tide.
Tidal coefficient X16. Nautical Science, Navigation and COLREGs
French-style indicator of tidal range strength.
Tidal Constituent D2. Hydrography, tides, waves, bathymetry and marine geology
Sinusoidal component of the tide such as M2, S2, K1, or O1.
Tidal Current D2. Hydrography, tides, waves, bathymetry and marine geology
Horizontal water motion associated with the tide.
Tidal Datum D2. Hydrography, tides, waves, bathymetry and marine geology
Reference plane defined by a phase of the tide such as MLLW.
Tidal diamond X16. Nautical Science, Navigation and COLREGs
Lettered position on a chart with tabulated tidal-stream data.
Tidal energy converter X57. Ocean Energy Beyond Wind
General term for any device that captures kinetic or potential energy from tides, including stream turbines and barrage turbines.
Tidal Energy Vessel E4. Cruise, offshore energy and auxiliary/specialised fleets
Specialist vessel installing/maintaining tidal turbines.
Tidal kite X57. Ocean Energy Beyond Wind
Tethered underwater device that flies in a figure-eight pattern through tidal currents, developed by Minesto.
Tidal lagoon X57. Ocean Energy Beyond Wind
Impoundment built off an estuary that uses bidirectional turbines and sluices to generate from tidal range.
Tidal Mixing D1. Physical and chemical oceanography and marine meteorology
Mixing caused by interaction of tidal currents with topography.
Tidal range C4. Ports, terminals and coastal/marine civil engineering
Difference between mean high and low tide.
Tidal range scheme X57. Ocean Energy Beyond Wind
Generic term for barrage and lagoon projects that exploit vertical tide differences for power generation.
Tidal stream X16. Nautical Science, Navigation and COLREGs
Horizontal water movement due to tides.
Tidal stream atlas B3. Nautical Science
Admiralty tidal stream publication.
Tidal Stream Atlas (NP218 family) X16. Nautical Science, Navigation and COLREGs
UKHO atlases showing hourly tidal streams.
Tidal Transit X59. Offshore Wind O&M, CTVs and SOVs
UK CTV operator headquartered in Wells next the Sea providing crew transfer to southern North Sea wind farms.
Tidal window C4. Ports, terminals and coastal/marine civil engineering
Operational window based on tide for deep draft vessels.
Tide X16. Nautical Science, Navigation and COLREGs
Periodic vertical rise and fall of water due to gravitational forces of Moon and Sun.
Tide Calendar (Alang) X118. Ship Recycling Yards, Beaches and Regulation
Lunar-month tide chart used by GMB and plot operators to schedule beaching slots.
TIDE Forecasting X129. Hydrographic Offices, Survey Vessels and Marine Cartography
Generation of tidal predictions for ports using harmonic analysis of historical tide gauge records.
Tide gauge B3. Nautical Science
Instrument recording sea-surface elevation.
Tide Gauge Monitoring X60. Marine Salvage and Wreck Removal
Real time tide measurement at a casualty site to inform refloating decisions.
Tide Information for Pipelay (TIP) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
Marine planning data combining tide, current, and weather for pipelay station-keeping.
Tide Pole X73. Marine Hydrography, Charting and ENC
A graduated staff used to observe water level for survey reduction to chart datum.
Tide Prediction D2. Hydrography, tides, waves, bathymetry and marine geology
Calculation of future tides using harmonic analysis.
Tide Producing Force D2. Hydrography, tides, waves, bathymetry and marine geology
Differential gravitational pull of Sun and Moon on the ocean.