Glossary

Maritime glossary, terms beginning with D (page 9)

All maritime glossary terms that begin with the letter D, drawn from every subject section. 2401 entries.

Showing 250 of 2401 terms (page 9 of 10).

Drew and Napier X114. Maritime Arbitration and Shipping Law Firms: Singapore law firm with a shipping practice and frequent SCMA appointments.
Drewry X44. Shipping Indices, FFAs and Freight Markets: London-based maritime research firm publishing the World Container Index used as a benchmark for container freight derivatives.
Drewry Bunker Index X72. Bunkering Hubs and Bunker Suppliers: Bunker price benchmark family published by Drewry Maritime Research used in some COA escalators.
Drewry Manning Annual Review X102. Seafarer Welfare and Maritime Charities: Long-running market report on seafarer supply and demand published by Drewry Maritime Research.
Drewry Maritime Research X138. Global Container Terminal Operators and Port Equipment: London-based shipping consultancy publishing the annual Global Container Terminal Operators Report.
Drewry Maritime Services X71. Shipbrokers and Brokerage Firms: London-based maritime research, advisory, and supply chain consultancy.
Drewry Reefer Forecaster X136. Reefer Vessels and Cool Chain Operators: Quarterly reefer market report from Drewry Maritime Research, covering rates, capacity, and trade flows.
Drewry Salvage Capacity Report X167. Major Salvage Companies, Wreck Removals, and Equipment: Industry analytic on global heavy lift and salvage tonnage availability.
DRG-450 X169. Container Terminal Cranes, Yard Equipment, and Lashing: Kalmar reach stacker with 45 ton lifting capacity in the first container row, used for laden container handling in yard depots.
Drift X3. Ship Handling, Seamanship and Deck Vocabulary: Speed of a current; leeway of a vessel.
Drift Anchor Recovery X28. Ship Recycling and End-of-Life: Salvage of bow and stern anchors prior to beaching.
Drift angle X3. Ship Handling, Seamanship and Deck Vocabulary: Angle between the ship's head and her track during a turn.
Drift angle (beta) B1. Naval Architecture: Angle between hull centerline and velocity vector.
Drift Calculation X80. Maritime Search and Rescue Coordination: Estimation of survivor or debris movement from incident position to datum.
Drift Error X80. Maritime Search and Rescue Coordination: Component of search area uncertainty arising from drift estimation.
Drift Gillnet X87. Fishing Vessels and Fisheries Management: Unanchored gillnet drifting with current and wind, regulated under UN General Assembly Resolution 46/215 on large scale high seas driftnets.
Drift Gillnetter X87. Fishing Vessels and Fisheries Management: Vessel deploying drift gillnets, used historically in the North Pacific salmon and squid fisheries.
Drift grounding X12. Maritime Casualties and Investigation: Grounding that follows a loss of propulsion and uncontrolled set.
Drift Ice D5. Coastal processes, sea-level, cryosphere and ocean observation science: Sea ice not attached to the shore, drifting with winds and currents.
Drift lead X3. Ship Handling, Seamanship and Deck Vocabulary: Lead dropped on the bottom to detect a dragging anchor.
Drift Modeling X60. Marine Salvage and Wreck Removal: Numerical prediction of drifting casualty or oil slick trajectories using wind, current, and wave inputs.
Drift Net (Fishing) E4. Cruise, offshore energy and auxiliary/specialised fleets: Largely banned fishing gear; relevant to fleet types.
Drift Prediction X126. Marine Oil Spill Response and OPRC Regimes: Trajectory modeling using GNOME, OILMAP, OSCAR, or OpenDrift to forecast oil movement.
Drift sampling X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: Sampling at the manifold during the entire transfer per MEPC.182(59) guidelines.
Drift Sediment D2. Hydrography, tides, waves, bathymetry and marine geology: Sediment transported by currents and deposited as a drift body.
Drifter D1. Physical and chemical oceanography and marine meteorology: Surface or subsurface device that follows currents to measure Lagrangian flow.
Drifting Buoy D5. Coastal processes, sea-level, cryosphere and ocean observation science: Free-drifting buoy reporting SST and SLP.
Drifting mine X77. Naval Mine Warfare and Mine Countermeasures: A free-floating sea mine, the unrestricted use of which is prohibited by Hague Convention VIII of 1907 beyond limited time-fused exceptions.
Drifting station X27. Polar Code, Ice Navigation and Polar Operations: Russian and US programs operating manned ice stations on multi-year floes from the 1930s onward.
Driftnet Ban (UN 1992) X87. Fishing Vessels and Fisheries Management: Global moratorium under UN GA Resolution 46/215 on large scale driftnets longer than 2.5 kilometers on the high seas.
Drill Floor X14. Offshore Oil and Gas Marine Operations: Working deck around the rotary table.
Drill Master X82. Saturation Diving and Offshore Diving Operations: Drillship where divers were killed in a 1983 North Sea incident.
Drill matrix X24. Cruise, Passenger Ship and Ferry Operations: Schedule of SOLAS-required crew exercises for fire, abandon ship, and security.
Drilled installation X42. Offshore Wind Installation and Cable Lay: Foundation installation method using reverse circulation drilling, applicable to hard or boulder rich seabeds.
Drilling Mud X75. IMDG Code, Classes, Packing and Segregation: Often not regulated unless containing dangerous components meeting IMDG classification thresholds.
Drilling Rig Move Survey X43. Marine Surveying and Warranty Surveying: A marine warranty attendance covering the towage or self-propelled relocation of offshore drilling units between locations.
Drilling Riser X14. Offshore Oil and Gas Marine Operations: Large diameter marine riser connecting subsea BOP to floating rig.
Drillship E4. Cruise, offshore energy and auxiliary/specialised fleets: Mobile offshore drilling unit shaped as a ship.
Drillship 6th Generation X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Drillship class characterized by dual derricks, DP3, and ratings up to 10,000 to 12,000 foot water depth.
Drillship 7th Generation X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Latest drillship class with enhanced hookload, dual BOPs, and 20,000 psi BOP capability options.
Drinking Water Quality Test X86. Port Agency, Husbandry and Disbursement: Sampling and testing of potable water supplied at berth.
Drip lubrication X61. Marine Lubricants and Cylinder Oils: Lubrication method delivering oil by gravity feed, used historically on some auxiliary equipment.
Drip sample X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Sample continuously drawn at constant rate during bunker transfer via a sampling cock at the ship manifold.
Drip sampler X47. Marine Fuel Quality and ISO 8217: Sampling device that collects a continuous proportional fraction of the bunker stream throughout delivery.
Drip tray X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Containment beneath manifold connections to catch spills during bunkering.
DRiVE X124. Dredging Industry and Reclamation Contractors: DEME Carbon Capture project that retrofits dredgers with LNG and methanol dual-fuel systems.
Driveability study X42. Offshore Wind Installation and Cable Lay: Geotechnical and pile dynamic analysis predicting hammer blow count for monopile installation.
Drivetrain X59. Offshore Wind O&M, CTVs and SOVs: Mechanical assembly of main shaft, main bearing, gearbox, and generator inside a wind turbine nacelle.
Driveway Loading X104. Project Cargo Forwarders and Heavy Transport: Permissible wheel load over a culvert or driveway crossed by a heavy trailer.
DriX X65. ROVs, AUVs, USVs and Marine Robotics: Diesel-electric monohull USV from Exail, formerly iXblue, used for survey and acoustic positioning support.
Drogue X3. Ship Handling, Seamanship and Deck Vocabulary: Sea anchor or speed-reducing device streamed astern.
Drogue (Drifter) D5. Coastal processes, sea-level, cryosphere and ocean observation science: Subsurface element ensuring a drifter follows water at a specified depth.
DROMLAN X133. Polar Research Vessels and Polar Code Regimes: Dronning Maud Land Air Network, multinational intra-continental airlift consortium.
Dromon X39. Pre-1900 Maritime History: Byzantine war galley of the sixth to twelfth centuries armed with Greek fire.
Drone Bathymetry D5. Coastal processes, sea-level, cryosphere and ocean observation science: Use of UAVs with lidar or photogrammetry for shallow bathymetry.
Drone Hull Inspection X96. Hull Integrity Monitoring and Strain Gauges: Use of aerial unmanned vehicles for close-up visual inspection of hull structures.
Drone Inspection X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Use of unmanned surface vehicles and AUVs to inspect pipeline corridors and cable landfalls without dedicated DSVs.
Drone Mothership X109. Maritime Autonomous Surface Ships and MASS Code: A larger vessel configured to launch and recover smaller unmanned craft, an emerging operational concept in defense and survey.
Dronning Maud Land X133. Polar Research Vessels and Polar Code Regimes: Queen Maud Land in English, Norwegian Antarctic claim sector hosting Troll station.
Droop Control X67. Marine Electrical Systems and Shore Power: Generator governor and AVR characteristic that allows stable load sharing between paralleled units.
Drop Anchor Clause X17. Chartering, Shipbroking and Freight Trading: Time charter provision regarding orders to anchor and resulting cost allocation.
Drop and pick X6. Container, Intermodal and Trade Codes: Trucking move where empty chassis is left and loaded chassis collected.
Drop Cell X100. Marine Cathodic Protection and Anodes: A handheld reference electrode lowered into the water on a cable to take spot potential readings of a hull or structure.
Drop-Cell Survey X100. Marine Cathodic Protection and Anodes: A potential survey performed using a drop cell traversed around the structure.
Drop-Frame Chassis X83. ISO Container Manufacturing and Leasing: Chassis with depressed center for over-height containers on US domestic routes.
Drop-In Biofuel X111. Methanol, Ammonia and Alternative Marine Fuels: Renewable fuel chemically compatible with conventional marine diesel engines and bunker infrastructure without modification, typified by HVO.
Drop-in fuel X34. Decarbonization, Alternative Fuels and Carbon Pricing: Bio or synthetic fuel meeting ISO 8217 distillate or residual specifications and usable without engine modification.
Dropped from subs X71. Shipbrokers and Brokerage Firms: Status when subjects are not lifted within the deadline, terminating the deal.
Dropped Object X14. Offshore Oil and Gas Marine Operations: Item falling from height offshore; major safety category (DROPS).
Dropped Object Study X104. Project Cargo Forwarders and Heavy Transport: Hazard analysis of consequences if a project unit falls during lifting.
Dropped Object Survey X31. Helicopter Operations on Ships: Inspection of overhead structures near helideck for fall hazards.
Dropping the pilot X32. Marine Pilotage and Pilot Operations: Disembarkation of the pilot at the outbound pilot station.
DRP Disaster Recovery Plan X25. Maritime Cybersecurity, OT and IT: Plan for restoring IT services after a disruptive event.
Drug Administration Record X41. Cruise Ship Public Health and VSP/USPH: Medical center documentation, separate from the AGE log, required by ship policy for clinical compliance.
Drug and alcohol policy C2. Ship operations, crewing and technical management: Company D&A policy aligned with OCIMF and CDI.
Drug Trafficking by Sea E1. Maritime security, geopolitics and risk: Maritime narcotics smuggling addressed by 1988 Vienna Convention.
Drum X3. Ship Handling, Seamanship and Deck Vocabulary: Cylindrical part of a winch on which rope is wound.
Drum (1A1, 1A2, 1B1, 1B2, 1D, 1G, 1H1, 1H2, 1N1, 1N2) X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: UN specification packaging codes for steel non-removable head (1A1), steel removable head (1A2), aluminium drums, plywood, fibre, plastics, and other metal drums.
Drum Brake (Hoist) X94. Port Machinery and Quay Equipment Makers: Service brake mounted on the hoist drum shaft of cranes for holding loads under power loss.
Drum Cargo X1. Cargo Science, Commodities and Cargo Care: 200 L steel/plastic drums; breakbulk or palletized.
Drum Cussac X127. Maritime Security, Anti-Piracy and PMSCs: UK risk management firm founded 1989, acquired by GardaWorld in 2018, with maritime division.
Drum End X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Smooth tapered end of a windlass shaft used for warping, also called a warping head or gypsy head.
Drum Level Controller X63. Marine Auxiliary Machinery and Pumps: System maintaining boiler water level using single-, two-, or three-element control.
Drum Skimmer X126. Marine Oil Spill Response and OPRC Regimes: Oleophilic skimmer using rotating drums, common in Walosep and Elastec Magnum models.
Drumming X15. Ports, Terminals and Stevedoring: securing oil drums for sea transport at breakbulk terminals.
Drumstick X124. Dredging Industry and Reclamation Contractors: Slang for cutter ladder counterweight.
Dry Abrasive Blast Cleaning X88. Marine Surface Preparation and Coatings Application: Surface preparation method covered by ISO 8504-2 using dry abrasive propelled by compressed air or centrifugal wheel.
Dry abrasive blasting X165. Marine Coatings, Antifouling, and Hull Husbandry: Surface preparation using non-recyclable copper slag or recyclable steel grit propelled by compressed air.
Dry Box X83. ISO Container Manufacturing and Leasing: Industry colloquial term for a general purpose dry freight container.
Dry Bulk X161. Shipbroking, Freight Derivatives, and Baltic Indices: Cargo segment covering iron ore, coal, grain, bauxite, alumina, fertilizers, and minor bulks moved on bulk carriers.
Dry Bulk Agency Specialist X86. Port Agency, Husbandry and Disbursement: Agency unit focused on dry bulk carriers and their husbandry needs.
Dry Bulk Cargo X1. Cargo Science, Commodities and Cargo Care: Unpackaged solid bulk, governed by IMSBC.
Dry Bulk Cargo Conference (UK Chamber of Shipping) X119. Maritime Conferences, Trade Shows and Awards: Annual UK industry meeting on bulk carrier operations.
Dry bulk carrier C1. Commercial shipping, chartering, economics and finance: Vessel carrying unpackaged dry bulk cargoes.
Dry Bulk Carrier Recycling Volume X50. Ship Recycling, Demolition and Hong Kong Convention: A category in annual demolition statistics, dominated by Capesize and Panamax tonnage at Alang and Chittagong.
Dry Bulk FFA X44. Shipping Indices, FFAs and Freight Markets: Forward Freight Agreement settling against a Baltic dry bulk route or sub-index average over a specified period.
Dry bulk terminal C4. Ports, terminals and coastal/marine civil engineering: Terminal handling dry bulk commodities.
Dry Cargo Barge X103. US Inland Waterway Towing and Barge: Any barge carrying solid cargo such as grain, coal, ore or stone, as distinct from a tank barge.
Dry cargo broker X71. Shipbrokers and Brokerage Firms: Broker active in bulk commodities including coal, ore, grain, and minor bulks.
Dry Cargo Container X83. ISO Container Manufacturing and Leasing: General purpose ISO container for unitized dry cargo, the most common container type.
Dry cargo desk X71. Shipbrokers and Brokerage Firms: Department of a shipbroking firm covering bulk carriers.
Dry Cargo Ship X75. IMDG Code, Classes, Packing and Segregation: Vessel carrying packaged or bulk dry cargo, subject to SOLAS VII and IMDG for dangerous goods.
Dry Cargo Survey X43. Marine Surveying and Warranty Surveying: A general class of inspections covering bulk and breakbulk dry cargoes from preloading to outturn.
Dry Cargo Vessel ADN X33. Inland Navigation and Barge Operations: ADN-certified inland vessel for solid dangerous goods.
Dry Cell Battery Inventory X50. Ship Recycling, Demolition and Hong Kong Convention: The Part III stores listing of portable battery types aboard the ship at delivery.
Dry Cleaning Turbocharger X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Crushed nutshell or specialised granular media injected into the turbine inlet to remove deposits without water injection.
Dry container C3. Logistics, freight forwarding and multimodal trade: Standard general purpose container.
Dry Deck Shelter (DDS) X91. Submarines and Submarine Cable Systems: Removable structure mounted on submarines to deploy special operations forces.
Dry dock X3. Ship Handling, Seamanship and Deck Vocabulary: Basin pumped dry for hull work.
Dry Dock Agent X86. Port Agency, Husbandry and Disbursement: Agent dedicated to vessels entering yards for repair or survey.
Dry Dock Pilot X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Specialized pilot licensed for the close-quarters maneuver of placing a vessel inside a graving dock or floating dock.
Dry docking C2. Ship operations, crewing and technical management: Periodic dry dock survey, typically every five years.
Dry docking allowance C1. Commercial shipping, chartering, economics and finance: Charter clause allowing owners off-hire for dry docking.
Dry Docking Loads X54. Naval Architecture Software and IACS Rules: Block reactions during docking, modeled in MAESTRO and DNV Poseidon for class approval.
Dry EGCS X69. EGCS Scrubbers, SCR and Marine Air Emissions: Exhaust gas cleaning technology using solid hydrated lime granulate instead of washwater.
Dry exhaust X19. Engine Room Watchkeeping and UMS Operations: Engine exhaust arrangement without water injection, used on most marine diesels.
Dry FFA Brokers Association (FFABA) X44. Shipping Indices, FFAs and Freight Markets: Trade body whose standard documentation underpins most cleared and bilateral dry FFA trading.
Dry Friction Test X31. Helicopter Operations on Ships: Measurement of helideck surface friction in dry conditions, minimum 0.65 per CAP 437.
Dry Hold X87. Fishing Vessels and Fisheries Management: Refrigerated hold without circulating seawater, used for boxed and palletized fish on stern trawlers.
Dry Ice X75. IMDG Code, Classes, Packing and Segregation: UN 1845, Class 9, regulated for IMDG with provisions for ventilation and asphyxiation hazard control.
Dry Lay-Up X63. Marine Auxiliary Machinery and Pumps: Boiler preservation by removing all water and adding desiccant to prevent corrosion during shutdown.
Dry port X15. Ports, Terminals and Stevedoring: inland terminal connected to a seaport by rail or road.
Dry Powder Cargo X1. Cargo Science, Commodities and Cargo Care: Cement, fly ash, alumina; loaded by air conveyor or chute.
Dry powder fire-extinguishing system X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Regulated under FSS Code Chapter 6 for fixed installation aboard ships carrying liquefied gases in bulk (IGC Code).
Dry Scrubber X69. EGCS Scrubbers, SCR and Marine Air Emissions: Synonym for dry EGCS, removing SOx through reaction with calcium hydroxide.
Dry Storage X41. Cruise Ship Public Health and VSP/USPH: Food storeroom kept at 21 C (70 F) or below with relative humidity controlled to limit pest and mold growth.
Dry Stores X120. Marine Catering, Provisions and Ship Chandlers: Ambient temperature provisioning category, including flour, sugar, rice, and canned goods.
Dry Suit X97. Polar Expedition Cruise and IAATO Operations: Waterproof suit issued on some operators' Arctic kayak and snorkel programs to provide thermal protection.
Dry Tow X167. Major Salvage Companies, Wreck Removals, and Equipment: Heavy lift float-on float-off transport of salvaged casualties from incident site to repair or scrap yard.
Dry-break coupling X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Self-sealing coupling preventing spillage on disconnection, common in LNG and methanol transfer.
Dry-dock alignment X38. Propellers, Stern Gear and Shaft Lines: Cold static alignment with the vessel in dry dock, used as a baseline before afloat verification.
Dry-Dock Clause X17. Chartering, Shipbroking and Freight Trading: Time charter clause regulating periodic dry-docking obligations and off-hire treatment.
Dry-dock cleaning X18. Ballast Water, Biofouling and Antifouling: Removal of biofouling and renewal of antifouling coating during dry-docking.
Dry-Dock Dismantling X50. Ship Recycling, Demolition and Hong Kong Convention: A recycling method where the vessel is fully enclosed within a dry dock, used at several European and Chinese facilities to contain emissions.
Dry-dock interval B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: 5-year class survey cycle.
Dry-Dock Recycling X28. Ship Recycling and End-of-Life: Dismantling method conducted entirely within a dry dock with full containment.
Dry-Dock Specification X40. Tanker Vetting, SIRE and VIQ: The planned scope for the next dry-docking, sometimes requested by charterers during long-term acceptance reviews.
Dry-ice CO2 charge X26. Reefer Containers and Cold Chain Logistics: Expendable refrigeration system using solid CO2 sublimation; rare in international reefer trade.
Dry-to-handle X45. Marine Paints, Coatings and Antifouling: Stage of cure at which a coating can be touched lightly without damage.
Dry-to-overcoat maximum X45. Marine Paints, Coatings and Antifouling: Time beyond which the previous coat must be roughened or treated before overcoating.
Dry-to-recoat X45. Marine Paints, Coatings and Antifouling: Time after application at which the next coat may be applied.
Dry-to-service X45. Marine Paints, Coatings and Antifouling: Time after application at which the coating may be immersed or placed in service.
Dryad Global X127. Maritime Security, Anti-Piracy and PMSCs: Maritime intelligence firm headquartered in London, formerly Dryad Maritime, founded 2005, publishes weekly threat assessments.
Drydock Arrival Inspection X113. Drydock and Ship Repair Yards: Yard and surveyor walk-through on arrival to record condition, agree workscope additions, and authorize commencement of work.
Drydock Block Plan X113. Drydock and Ship Repair Yards: Detailed layout of keel blocks and bilge blocks placed on the dock floor to support the vessel during dewatering and works.
Drydock Certificate X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: The class-issued document confirming the last underwater hull inspection, verified at every vetting cycle.
Drydock Cyber Refit X48. Maritime Cybersecurity: Planned cyber upgrade during a vessel's drydocking, including firmware, segmentation, and monitoring improvements.
Drydock Cycle X113. Drydock and Ship Repair Yards: Five-year survey cycle within which two drydockings are normally required for vessels less than fifteen years old per IACS UR.
Drydock Departure Inspection X113. Drydock and Ship Repair Yards: Final check before flooding-up confirming completion of underwater works, coatings, anodes, and removal of staging.
Drydock Gate X113. Drydock and Ship Repair Yards: Closure element of a graving dock, either a sliding caisson, hinged gate, or flap gate that seals the entrance.
Drydock Insurance X4. Marine Insurance, P&I and Claims: cover for floating dry docks or for vessels while in dry dock.
Drydock interval X18. Ballast Water, Biofouling and Antifouling: Time between dry-dockings, affecting biofouling accumulation and AFS performance.
Drydock Pricing X113. Drydock and Ship Repair Yards: Combination of fixed day rate, dock entry charge, services, and workscope-based items that determines yard invoice value.
Drydock Refit Cycle X164. Cruise Industry, Brands, Ship Classes, and Terminals: The regular interval, typically 24 to 30 months, between scheduled drydocking of cruise ships for class survey and refurbishment.
Drydock Salvage X60. Marine Salvage and Wreck Removal: Operations to bring a casualty into drydock for structural repair after refloating.
Drydock Specification Survey X43. Marine Surveying and Warranty Surveying: An attendance to compile, review, and police the work specification for a planned drydocking on behalf of owners or managers.
Drydock Survey X5. Marine Surveying and Inspection: Out-of-water survey of underwater hull, rudder, propeller, and sea valves.
Drydock Workscope X113. Drydock and Ship Repair Yards: Detailed specification of repair, survey, and conversion items to be executed during the yard stay.
Drydocking X29. Ship Sale and Purchase, Management Contracts and Valuation: Hull inspection in dock, addressed in NSF 2012 Clause 6.
Drydocks World Dubai X113. Drydock and Ship Repair Yards: Dubai-based repair complex within DP World operating three graving docks and floating docks up to VLCC capacity.
Drydocks World Salvage X99. Marine Salvage Awards and SCOPIC: United Arab Emirates salvage and offshore services provider.
Drying (Tank) X20. LNG Operations and Custody Transfer: Removal of moisture using dry air (dew point typically below minus 45 degrees C) before inerting to prevent ice formation.
Drying height X16. Nautical Science, Navigation and COLREGs: Height above chart datum of a feature that uncovers at low water.
Drying time X45. Marine Paints, Coatings and Antifouling: Generic term for time required to reach a specified film state.
DryShips X49. Ship Finance, Leasing and Maritime Capital Markets: Greek listed shipping company that became a frequent case study in dilutive equity issuance and restructuring.
DS-80 X89. ECDIS and Bridge Equipment Makers: Furuno Doppler speed log measuring two axes of ground and water speed.
DSB Marine Section X163. Marine Accident Investigation Agencies and Landmark Inquiries: Specific marine investigation cadre within the Dutch Safety Board.
DSC X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Digital Selective Calling per ITU-R M.493 and ITU-R M.541.
DSC (Digital Selective Calling) B3. Nautical Science: GMDSS distress alerting on VHF/MF/HF.
DSC Class A X95. GMDSS Equipment and Survival Craft Communications: Highest category of DSC equipment compliant with ITU-R M.493 capable of all calls on all frequencies, required on SOLAS vessels.
DSC Class D X95. GMDSS Equipment and Survival Craft Communications: Reduced functionality DSC equipment for VHF used on non SOLAS vessels.
DSC Code X132. High-Speed Craft, Hydrofoils and Ferry Operators: Code of Safety for Dynamically Supported Craft, IMO Resolution A.373(X) of 1977, predecessor to the HSC Code.
DSC Code 1981 X158. IMO Conventions, Protocols, Codes, and Resolutions: Code of Safety for Dynamically Supported Craft, superseded for new vessels by the HSC Code from 1996.
DSC controller B3. Nautical Science: Built-in or standalone DSC modem.
DSC distress alert X36. Shipboard Medical, Telemedicine and Seafarer Health: GMDSS Digital Selective Calling alert used to summon urgent medical advice via coast station.
DSC Self-Identification X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Programmed 9-digit MMSI in a DSC controller.
DSC Watch X80. Maritime Search and Rescue Coordination: Automated reception of DSC distress alerts on Channel 70 and other frequencies.
DSCC (Deep Sea Conservation Coalition) D4. Fisheries, aquaculture, blue economy and marine resources: NGO coalition on deep-sea fisheries and mining.
DSEI X119. Maritime Conferences, Trade Shows and Awards: Defence and Security Equipment International, biennial London event since 1999 with naval pavilion.
DSF X49. Ship Finance, Leasing and Maritime Capital Markets: Common abbreviation for Danish Ship Finance.
DSL Backup X68. Maritime Satcom and Telecommunications: Use of port-side wired broadband to complement or fall back from a vessel satellite link while alongside.
DSM X73. Marine Hydrography, Charting and ENC: Data Server Module, a category of S-100 service component.
DSME X20. LNG Operations and Custody Transfer: Daewoo Shipbuilding & Marine Engineering (now Hanwha Ocean), historical builder of Q-Flex and Q-Max series.
DSME / Hanwha Ocean LNG Carriers D6. Decarbonization, emissions and alternative fuels: Builders supplying LNG carriers and dual-fuel vessels.
DSME LNG Carrier Yard X110. LNG Bunkering Infrastructure and Vessels: Daewoo Shipbuilding and Marine Engineering shipyard in South Korea, builder of LNG carriers and LNG dual-fuel vessels.
DSPL X65. ROVs, AUVs, USVs and Marine Robotics: DeepSea Power and Light, a US maker of subsea lights and cameras widely fitted to ROVs and AUVs.
DST (dynamic shock test) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Shock trial for naval ships.
DSUK X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Danish Seamen's Mission abroad, with chaplaincies for Danish-speaking seafarers and traders.
DSV X13. Marine Salvage and Wreck Removal: Dive Support Vessel, dynamically positioned platform for saturation diving operations.
DSV (Dive Support Vessel) B5. Ship Types and Individual Vessels: Subsea diving support ship.
DSV A/S X104. Project Cargo Forwarders and Heavy Transport: Hedehusene, Denmark-headquartered global forwarder, with Project Industrial Logistics division.
DSV Bibby Sapphire X82. Saturation Diving and Offshore Diving Operations: Former Bibby Offshore DSV.
DSV Skandi Achiever X82. Saturation Diving and Offshore Diving Operations: Subsea 7 chartered diving and ROV vessel.
DTHC X6. Container, Intermodal and Trade Codes: Destination Terminal Handling Charge.
DTM (Digital Terrain Model) X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Gridded depth or elevation surface, in hydrography typically resampled from CUBE or weighted-mean processing of multibeam soundings.
DTN X96. Hull Integrity Monitoring and Strain Gauges: Weather services provider offering marine forecasts and routing guidance to commercial fleets.
DTN Maritime X78. Voyage Optimization and Vessel Performance Software: The maritime weather routing and forecasting business that combines former MeteoGroup, SPOS, and Meteorlogix product lines under the DTN brand.
DTN Navmaster X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: Voyage optimization and route planning service from DTN (formerly Meteorlogix and WSI).
DTOC X42. Offshore Wind Installation and Cable Lay: Dudgeon Triton Knoll Offshore Cable; not applicable here; placeholder noting offshore cable corridor naming conventions.
DTU Mechanical Engineering Maritime Section X160. Maritime Academies, Universities, and STCW Certification: Technical University of Denmark department at Lyngby offering ocean engineering and marine systems research.
DTV ADS 1919 X108. Marine Insurance and P&I Clubs: The Allgemeine Deutsche Seeversicherungsbedingungen, the German general marine insurance conditions originally codified in 1919 and revised over time.
DTV-Hull X53. Marine Insurance, P&I and Hull Clauses: The German General Conditions for Hull Insurance issued by the Gesamtverband der Deutschen Versicherungswirtschaft, used in the German market.
DU-MAN X90. Marine Engine Specific Model Enumeration: Diesel United production line of licensed MAN B&W two-stroke marine engines.
DU-Sulzer X90. Marine Engine Specific Model Enumeration: Diesel United production line of licensed Sulzer two-stroke marine engines from the era preceding WinGD.
Dual Activity Drillship X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Drillship with two drilling stations allowing parallel operations to reduce well construction time.
Dual Agency Appointment X86. Port Agency, Husbandry and Disbursement: Appointment of separate agents by owner and charterer at the same port.
Dual Antenna Configuration X68. Maritime Satcom and Telecommunications: Installation of two satellite antennas to mitigate mast blockage on the opposite side.
Dual Caterpillar Tensioner X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Pipelay device with two parallel caterpillar tracks providing controlled pulling force on the pipeline.
Dual Certification X28. Ship Recycling and End-of-Life: Vessel holding both HKC IHM Certificate and EU SRR IHM Certificate.
Dual Class X8. IACS, Class Rules and Class Notations: simultaneous classification with two IACS members under a dual class agreement.
Dual Currency Loan X49. Ship Finance, Leasing and Maritime Capital Markets: Facility split between USD and another currency, rare in shipping which is predominantly USD.
Dual cycle X15. Ports, Terminals and Stevedoring: see double cycling.
Dual Domicile X114. Maritime Arbitration and Shipping Law Firms: Choice of forum issue arising when defendants are domiciled in different jurisdictions.
Dual Fisheries (RFMO Overlap) X87. Fishing Vessels and Fisheries Management: Fishing operations subject to more than one RFMO, common where ICCAT and IOTC waters meet near the Cape of Good Hope.
Dual Frequency Echosounder X87. Fishing Vessels and Fisheries Management: Calibrated 38 and 200 kilohertz transducer used for pelagic biomass estimation.
Dual frequency probe X165. Marine Coatings, Antifouling, and Hull Husbandry: Ultrasonic instrument used to verify ballast tank coating thickness without destructive sampling.
Dual Fuel (DF) X90. Marine Engine Specific Model Enumeration: Suffix denoting engines capable of running on natural gas with a pilot of liquid fuel, as in W50DF and L51/60DF.
Dual Fuel Bunker Demand X72. Bunkering Hubs and Bunker Suppliers: Bunker fuel offtake from vessels that can run on LNG, methanol, or ammonia plus a pilot fuel.
Dual fuel CO2 carrier X57. Ocean Energy Beyond Wind: CO2 transport vessel capable of operating on conventional and alternative fuels such as LNG or methanol.
Dual fuel diesel electric X134. LNG and LPG Carrier Operators and Containment Systems: Propulsion architecture using DFDE engines burning boil-off gas and marine diesel, standard on 2003 to 2014 generation LNGCs.
Dual Fuel ENC X73. Marine Hydrography, Charting and ENC: Informal term for vessels carrying both ENC and paper backup, permitted under SOLAS V/19.2.1.5.
Dual Fuel Engine Decommissioning X50. Ship Recycling, Demolition and Hong Kong Convention: The procedure for purging LNG fuel systems and inerting gas piping before recycling, increasingly relevant for newer tonnage.
Dual Fuel Propulsion X109. Maritime Autonomous Surface Ships and MASS Code: A propulsion arrangement found on some Avikus enabled vessels such as the LNG carrier on the Stella Maris voyage.
Dual hoist X15. Ports, Terminals and Stevedoring: STS crane with two main hoists for tandem operations.
Dual Link Backhaul X109. Maritime Autonomous Surface Ships and MASS Code: A communications strategy that simultaneously maintains two independent links to shore for control redundancy.
Dual Membrane (NO96) X20. LNG Operations and Custody Transfer: GTT Invar 36 percent Ni primary and secondary barriers with plywood box insulation.
Dual rail X15. Ports, Terminals and Stevedoring: terminal with two parallel rail tracks under the STS portal.
Dual Recovery System X60. Marine Salvage and Wreck Removal: Spill response setup combining boom and skimmer in a J or U configuration.
Dual Salvage Tug X167. Major Salvage Companies, Wreck Removals, and Equipment: Configuration of two tugs sharing salvage duties on a single casualty to ensure redundancy.
Dual Survey X99. Marine Salvage Awards and SCOPIC: Joint survey of damage by salvor and property surveyors to record the condition of salved property.
Dual Trigger Cover X117. Marine Insurance Markets, Captives and Reinsurance: A coverage that responds only when two specified events both occur, used in some marine cyber and contingent products.
Dual Valuation Clause X4. Marine Insurance, P&I and Claims: ITC Hulls clause valuing the vessel at a higher figure for total loss than for partial loss claims.
Dual Watch X22. Piracy, Maritime Security and Armed Protection: BMP recommended doubling of bridge watch during HRA transits.
Dual-Crew (Blue/Gold) E2. Naval, defence and maritime law enforcement: Two crews rotated on SSBN to maximize at-sea time.
Dual-Cycling X46. Container Terminal Operations: A ship-to-shore crane operating mode that alternates loading and discharging within the same vessel call to reduce idle empty hoists.
Dual-fuel changeover X47. Marine Fuel Quality and ISO 8217: Operational switch between fuel grades for SECA compliance or engine reliability, requiring viscosity and temperature management.
Dual-Fuel Conversion X113. Drydock and Ship Repair Yards: Drydock retrofit installing gas fuel tanks, double-walled piping, and engine modifications for LNG, methanol, or ammonia operation.
Dual-fuel CPP X38. Propellers, Stern Gear and Shaft Lines: CPP whose control algorithm is tuned to match the load curve of dual-fuel main engines.
Dual-fuel engine B2. Marine Engineering: Engine running on both liquid and gaseous fuels (e.g., WinGD X-DF).
Dual-Fuel Engine (Annex VI) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: A marine engine capable of operating on gaseous and liquid fuels, regulated under Reg 13 for NOx and the IGF Code for safety.
Dual-fuel engines (polar) X27. Polar Code, Ice Navigation and Polar Operations: Engines burning LNG and MGO used on Arctic LNG carriers to comply with HFO restrictions.
Dual-Head Multibeam X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Configuration with two sonar heads angled outward to widen swath in shallow water, common on NOAA survey launches and harbor survey vessels.
Dual-Hoist STS X169. Container Terminal Cranes, Yard Equipment, and Lashing: Ship-to-shore crane with two independent hoists, an outer waterside hoist and an inner platform hoist, doubling cycle throughput.
Dual-Hoist STS Crane X46. Container Terminal Operations: A ship-to-shore crane equipped with two independent hoists on the same main trolley to handle two 40-foot containers in a single landside-waterside cycle.
Dual-Officer Cadet Programme F3. Seafaring Life, Education, Professions and Institutions: Combined deck and engine training.
Dual-Trolley STS X169. Container Terminal Cranes, Yard Equipment, and Lashing: STS crane with two trolleys passing containers via an intermediate platform, used by ZPMC and Mitsui designs at high-throughput terminals.
Dual-Trolley STS Crane X46. Container Terminal Operations: A ship-to-shore crane in which a waterside main trolley delivers containers to a landside trolley via an intermediate platform, decoupling the over-water motion from the apron motion.
Dual-Use Cargo X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: Goods on the EU Dual-Use Regulation 2021/821 list or U.S. Commerce Control List, subject to enhanced maritime screening to prevent diversion to sanctioned end-users.
Dual-Use Goods E1. Maritime security, geopolitics and risk: Items with civilian and military applications subject to export control.
Dual-Use Items X127. Maritime Security, Anti-Piracy and PMSCs: EU Regulation 2021/821 controlling export of certain security equipment used by PMSCs.