Glossary

Maritime glossary, terms beginning with D (page 5)

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

Showing 250 of 2401 terms (page 5 of 10).

Detached breakwater C4. Ports, terminals and coastal/marine civil engineering: Offshore breakwater for coastal protection.
Detail design B1. Naval Architecture: Engineering phase producing fabrication-ready drawings.
Detailed design B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Production design phase.
Detainable deficiency X7. Flag State, Port State Control and Detention Vocabulary: Finding so serious or in combination so numerous that the ship is unfit to proceed to sea, triggering action code 30.
Detainment X4. Marine Insurance, P&I and Claims: loss of free use and disposal of the vessel for a continuous period, triggering CTL under war risk cover.
Detect Function X48. Maritime Cybersecurity: NIST Cybersecurity Framework function focused on timely discovery of cyber events.
Detection of ice (radar) X27. Polar Code, Ice Navigation and Polar Operations: Use of X-band radar at short range to detect growlers and bergy bits.
Detective Control X139. Maritime Cybersecurity, OT Threats and Standards: Mechanism identifying incidents in progress, distinguished from preventive and corrective controls in ISO 27002.
Detegasa X63. Marine Auxiliary Machinery and Pumps: Spanish manufacturer of OWS and STP equipment widely fitted on offshore and merchant tonnage.
Detegasa CPS X63. Marine Auxiliary Machinery and Pumps: Detegasa compact STP for crew vessels.
Detegasa HDS X63. Marine Auxiliary Machinery and Pumps: Detegasa OWS series including HDS 1.0 and 2.5 m3/h units.
Detention A7. Compliance, certification and enforcement: PSC action holding a ship until deficiencies are rectified.
Detention by Port State Control C2. Ship operations, crewing and technical management: Holding of the vessel until deficiencies are rectified.
Detention damages C1. Commercial shipping, chartering, economics and finance: Damages for delay beyond laytime where no demurrage rate is fixed.
Detention free time C3. Logistics, freight forwarding and multimodal trade: Free days for return of empty containers.
Detention Heavy Cargo X104. Project Cargo Forwarders and Heavy Transport: Charge levied when project equipment is held beyond agreed free time.
Detention Notice X86. Port Agency, Husbandry and Disbursement: Document raised when port authority detains the vessel.
Detention of Vessel X99. Marine Salvage Awards and SCOPIC: Holding of a vessel by port or coastal state authorities pending compliance with salvage or wreck removal obligations.
Detention order X7. Flag State, Port State Control and Detention Vocabulary: Formal written instrument issued to the master imposing detention.
Detention Percentage X66. Port State Control and Regional MOUs: Ratio of detentions to inspections, used in flag and company performance calculations.
Detention pond X15. Ports, Terminals and Stevedoring: stormwater holding basin at terminals.
Detention rate X7. Flag State, Port State Control and Detention Vocabulary: Number of detentions per inspection, used in flag and RO performance lists.
Detention Record X40. Tanker Vetting, SIRE and VIQ: Port State Control detention history considered by charterers' screening models.
Detention review panel X7. Flag State, Port State Control and Detention Vocabulary: Internal mechanism in Paris MoU and Tokyo MoU for owners to challenge detention decisions.
Detention Review Panel (Paris MoU) X146. Port State Control Regimes, MoUs, and Inspection Systems: The independent panel that reviews detentions disputed by flag States or shipowners.
Detention Survey X43. Marine Surveying and Warranty Surveying: An inspection following port state control detention to verify rectification of deficiencies before the ship is released.
Detergency X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Lube oil additive function dispersing combustion soot and varnish precursors, evaluated by spot test ASTM D7899.
Detergent X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Lubricant additive that neutralizes acidic combustion products and keeps deposits in suspension.
Detergent Era X126. Marine Oil Spill Response and OPRC Regimes: 1967 to 1972 period after Torrey Canyon when toxic first-generation dispersants like BP1002 caused more damage than the oil.
Determination of preliminary issue X152. Maritime Arbitration and Dispute Resolution: Procedural device to decide a discrete legal or factual question, often used in jurisdiction or limitation challenges.
Deterministic Network X109. Maritime Autonomous Surface Ships and MASS Code: A network design with bounded latency and jitter used inside MASS control architectures to meet hard real time requirements.
Deterrent Lighting X22. Piracy, Maritime Security and Armed Protection: Use of searchlights and pyrotechnics to dissuade approaching skiffs.
Detonation X75. IMDG Code, Classes, Packing and Segregation: Supersonic combustion wave used to characterize Class 1.1 substances.
Detonator X75. IMDG Code, Classes, Packing and Segregation: Device intended to initiate an explosive train, often UN 0030, 0255 or 0267 in Class 1.1B or 1.4B.
Detonator Assemblies UN 0360/0361/0500 X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: Class 1 articles in Compatibility Group B or S depending on construction and confinement.
Detoxification Cell X118. Ship Recycling Yards, Beaches and Regulation: Designated hard-floor area at HKC yards for pre-removal of asbestos, PCB, and ODS before block-cutting.
Detritivore X10. Marine Biology, Fisheries and Oceanography: Organism feeding on detritus (decomposing organic matter).
Detritus D3. Marine environmental science, pollution and conservation: Dead particulate organic material in marine ecosystems.
Detroit Pneumatic X15. Ports, Terminals and Stevedoring: legacy supplier of cargo handling equipment, often referenced in specs.
Detuner (torsional) X38. Propellers, Stern Gear and Shaft Lines: Resilient or hydraulic device tuned to shift a torsional resonance out of the service range.
Detyens Shipyards X113. Drydock and Ship Repair Yards: South Carolina ship repair yard at the former Charleston Naval Shipyard with multiple drydocks for commercial and government work.
deugro Engineering Solutions X104. Project Cargo Forwarders and Heavy Transport: In-house engineering arm of deugro providing heavy lift and transport design.
deugro group X104. Project Cargo Forwarders and Heavy Transport: Frankfurt-based pure project freight forwarder founded in 1924 with about 70 offices worldwide.
deugro projects Houston X104. Project Cargo Forwarders and Heavy Transport: US specialist division of deugro focused on energy and petrochemical projects.
Deurganckdok X124. Dredging Industry and Reclamation Contractors: Antwerp container dock requiring continuous Scheldt maintenance dredging.
Deutsche Bank Shipping X49. Ship Finance, Leasing and Maritime Capital Markets: Historic shipping finance unit of Deutsche Bank, scaled back during the 2010s.
Deutsche Schiffsbank X49. Ship Finance, Leasing and Maritime Capital Markets: German specialist ship mortgage bank merged into Commerzbank in 2012.
Deutsche Seemannsmission X154. Maritime Welfare, Seafarer Charities, and MLC Rights: German Seamen's Mission, a Lutheran welfare body operating clubs in German ports and several foreign ports.
Deutsche Seemannsmission (DSM) X102. Seafarer Welfare and Maritime Charities: German Seamen's Mission, founded 1881, the Protestant maritime ministry of the Evangelical Church in Germany.
Deutsche Seemannsmission Training Resource X121. Maritime Education, Academies and Universities: German Seafarers' Mission supports welfare not formal training, included for clarity of distinction.
Deutsche Werft X113. Drydock and Ship Repair Yards: Historic German shipyard name associated with Hamburg ship repair operations now integrated into other groups.
Deutsche WindGuard X57. Ocean Energy Beyond Wind: German consultancy that publishes statistics on offshore wind and increasingly on marine energy adjacent metrics.
Deutsche Windtechnik X59. Offshore Wind O&M, CTVs and SOVs: Independent service provider known as DWT, performing multi brand turbine maintenance across European offshore wind farms.
Devagiri Steel X147. Ship Recycling, Hong Kong Convention, and Recycling Yards: A plot operator name found in Alang yard registers.
Devaluation clause C1. Commercial shipping, chartering, economics and finance: Charter clause adjusting hire for currency depreciation.
Devanning X1. Cargo Science, Commodities and Cargo Care: Unloading cargo from a container.
Deviation A5. Maritime Law, private and commercial: Departure from the contractual or geographic voyage; historically a fundamental breach.
Deviation (TMSA) X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: A documented departure from operator procedure that must be escalated and reviewed, tracked under TMSA Element 5.
Deviation card B3. Nautical Science: Compass deviation table for the magnetic compass.
Deviation Clause X51. Maritime Arbitration, Law and BIMCO Clauses: A bill of lading provision permitting reasonable deviations from the contractual route.
Deviation matrix (maneuvering) B1. Naval Architecture: Linear coefficients of hydrodynamic derivatives.
Device Authentication X139. Maritime Cybersecurity, OT Threats and Standards: IEC 62443-4-2 CR 1.2 requirement for each component to authenticate to its network.
Device Identity X48. Maritime Cybersecurity: Cryptographic identifier bound to a piece of equipment, increasingly required by IACS UR E27.
Devil Ray Conservation D4. Fisheries, aquaculture, blue economy and marine resources: Protective measures for mobulid rays under CMS.
Devil's Claw X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Two-prong chain stopper with hinged claw that locks over a stud link to secure the anchor when stowed at sea.
Devonport X39. Pre-1900 Maritime History: English royal dockyard at Plymouth established in 1691 as Plymouth Dock.
Dew Point X1. Cargo Science, Commodities and Cargo Care: Temperature at which water vapor condenses; key to ventilation decisions.
Dew Point Rule X155. Marine Surveying Practice and Cargo Inspection: A ventilation rule for hygroscopic cargoes that ventilation is permissible only when outside air dew point is lower than the cargo or hold dew point.
Dew Point Survey X5. Marine Surveying and Inspection: Measurement of dew point during coating, blasting, or grain hold preparation.
Dewaruci X128. Sail Training Ships and Tall Ship Associations: Indonesian Navy barquentine built 1953 at H. C. Stulcken and Sohn Hamburg, 58.5 m length, partnered since 2017 with the larger Bima Suci.
Dewatering X13. Marine Salvage and Wreck Removal: Pumping water out of flooded compartments to recover buoyancy.
Dewatering Pump X141. Marine Salvage Industry and Wreck Removal Contractors: Diesel or hydraulic submersible pump rated 100 to 1,000 cubic meters per hour.
Dewpoint Corrosion X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Acid attack on cooler economiser tubes and liner walls where exhaust gas or wall temperature falls below the sulfuric acid dewpoint.
Dewpoint Sensor X41. Cruise Ship Public Health and VSP/USPH: Instrument used in walk-in refrigeration to monitor humidity and prevent condensation onto food.
DF grade (distillate biofuel) X149. Marine Fuels, Bunkering, and Alternative Fuels: Distillate marine fuels containing up to 7% FAME under ISO 8217:2017 (grades DFA, DFZ, DFB).
DFA X115. Marine Bunker and Cargo Surveying: Biofuel-containing distillate marine fuel grade in ISO 8217 corresponding to DMA character with FAME content up to specified limit.
DFB X115. Marine Bunker and Cargo Surveying: Biofuel-containing distillate marine fuel grade in ISO 8217 corresponding to DMB character with FAME content within specified limit.
DFBI X54. Naval Architecture Software and IACS Rules: Dynamic Fluid Body Interaction module in STAR-CCM+ for resolving ship motions in waves.
DFDE X56. LNG/LPG Carriers and IGC Code: Dual-fuel diesel-electric propulsion using four-stroke medium-speed dual-fuel engines driving electric generators.
DFDE (Dual-Fuel Diesel Electric) X20. LNG Operations and Custody Transfer: Wartsila 50DF or MAN 51/60DF medium-speed engines burning HFO/MGO and BOG, driving electric propulsion.
DFDE LNG carrier X56. LNG/LPG Carriers and IGC Code: LNG carrier built with DFDE propulsion, common among vessels delivered between approximately 2005 and 2015.
DFDS X24. Cruise, Passenger Ship and Ferry Operations: Danish ferry and ro-ro operator across the North Sea, Channel, and Baltic.
DFDS Logistics X85. Ferries, Ro-Pax Operators and Routes: Freight and logistics arm of DFDS providing door-to-door trailer and intermodal services.
DFDS Seaways X85. Ferries, Ro-Pax Operators and Routes: Passenger brand of DFDS covering Copenhagen to Oslo, Newcastle to IJmuiden, and Channel routes.
DFIC X83. ISO Container Manufacturing and Leasing: Dong Fang International Container Holdings, a major Chinese container manufacturer with plants in Shanghai, Qingdao, Ningbo, and Tianjin.
DFT X45. Marine Paints, Coatings and Antifouling: Dry film thickness, the measured thickness of the cured coating, expressed in micrometers.
DFZ X115. Marine Bunker and Cargo Surveying: Biofuel-containing distillate marine fuel grade in ISO 8217 corresponding to DMZ character with FAME content within specified limit.
DG X6. Container, Intermodal and Trade Codes: Dangerous goods.
DG Environment, European Commission X50. Ship Recycling, Demolition and Hong Kong Convention: The directorate responsible for the EU Ship Recycling Regulation administration and the EU List of approved facilities.
DG Manifest C2. Ship operations, crewing and technical management: Dangerous goods manifest under SOLAS Chapter VII.
DG Shipping X98. Ship Registries and Flag States: Directorate General of Shipping under the Indian Ministry of Ports, Shipping and Waterways, headquartered in Mumbai.
DGCGM X130. National Coast Guards and Cutter Fleets: Direction Generale de la Gendarmerie Maritime, France, operates Athos-class patrol boats and supports Marine Nationale.
DGD X6. Container, Intermodal and Trade Codes: Dangerous Goods Declaration, shipper's signed statement of the hazardous nature and packaging of cargo.
DGDOC X75. IMDG Code, Classes, Packing and Segregation: Document of Compliance for the Carriage of Dangerous Goods under SOLAS II-2/19, issued to the ship by the flag administration.
DGNSS C4. Ports, terminals and coastal/marine civil engineering: General term covering DGPS and similar augmentation.
DGNSS Receiver X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: Differential GNSS receiver using IALA beacons or SBAS corrections.
DGNSS RTCM SC-104 B3. Nautical Science: Correction format for differential GNSS.
DGPS B3. Nautical Science: Differential GPS using IALA radio beacons.
DGPS (Differential GPS) X16. Nautical Science, Navigation and COLREGs: GPS augmentation using ground reference stations for corrections.
DGPS Beacon X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Marine radiobeacon transmitting differential GPS corrections in the 283.5 to 325 kHz band.
DGR X6. Container, Intermodal and Trade Codes: Dangerous Goods Regulations, IATA's air equivalent of the IMDG Code.
DGS X21. STCW Certificates, Crewing and Seafarer Welfare: Directorate General of Shipping, the Indian flag State administration issuing STCW certificates.
DGS (Directorate General of Shipping, India) X163. Marine Accident Investigation Agencies and Landmark Inquiries: Indian flag State authority in Mumbai whose Nautical Surveyor and DDG (MS) cadre conduct casualty inquiries under the Merchant Shipping Act 1958.
DGS Approval (India) X144. Bridge Simulators, Engine Room Simulators, and Maritime Training Equipment: Directorate General of Shipping circular requirements for simulator approval at Indian maritime training institutes.
DGS Approved MTI X55. Marine Simulators, Training and Maritime Academies: Maritime training institute approved by India's Directorate General of Shipping to deliver pre-sea and post-sea STCW courses.
DGSA X15. Ports, Terminals and Stevedoring: Dangerous Goods Safety Adviser per ADR/RID regulations.
DGzRS X80. Maritime Search and Rescue Coordination: Deutsche Gesellschaft zur Rettung Schiffbruchiger, German sea rescue society founded 1865.
DH-115 Fuselage X126. Marine Oil Spill Response and OPRC Regimes: Drift simulation node identifier (illustrative) used in OpenDrift particle tracking.
DH32 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS higher strength hull steel grade yield 315 MPa, impact tested at minus 20 degrees Celsius.
DH36 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS higher strength hull steel grade yield 355 MPa, impact tested at minus 20 degrees Celsius.
DH36 steel B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Higher-tensile steel with -20 °C Charpy.
DH40 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS higher strength hull steel grade yield 390 MPa, impact tested at minus 20 degrees Celsius.
DH47 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS ultra high strength hull steel grade yield 460 MPa, impact tested at minus 20 degrees Celsius.
DHCP Snooping X25. Maritime Cybersecurity, OT and IT: Switch feature that blocks rogue DHCP servers, used to protect bridge LANs.
DHI X175. Port Engineering, Dredging, Breakwaters, and Quays: Danish Hydraulic Institute, developer of the MIKE 21 and MIKE 3 modeling suites.
DHN X73. Marine Hydrography, Charting and ENC: Diretoria de Hidrografia e Navegacao, the Brazilian Navy hydrographic directorate.
DHN (Diretoria de Hidrografia e Navegacao) X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Brazilian Navy hydrographic directorate in Niteroi, producing Brazilian charts under IHO standards.
DHN Niteroi X73. Marine Hydrography, Charting and ENC: The headquarters of the Brazilian DHN.
Dhow F1. Maritime History: Lateen-rigged Arab and East African trading vessel of the western Indian Ocean.
Dia Yuan X42. Offshore Wind Installation and Cable Lay: Reference Chinese offshore wind installation jack-up vessel.
Diabetes management at sea X36. Shipboard Medical, Telemedicine and Seafarer Health: Glucometer monitoring; restricted-duty considerations under medical fitness regulations.
Diabos X71. Shipbrokers and Brokerage Firms: Athens-based shipbroking and laytime calculation house.
DIAC X114. Maritime Arbitration and Shipping Law Firms: Dubai International Arbitration Centre, Emirati institution administering maritime disputes under the 2022 DIAC Rules.
Diadromous X10. Marine Biology, Fisheries and Oceanography: Fish that migrate between fresh and salt water.
Diagenesis (Pollutant) D3. Marine environmental science, pollution and conservation: Chemical change of pollutants buried in sediments.
Diagnostic X19. Engine Room Watchkeeping and UMS Operations: System self test feature in ECMS and PMS reporting status of inputs and outputs.
Diagnostics Port X68. Maritime Satcom and Telecommunications: Service interface on a satellite terminal used for installation, monitoring, and firmware updates.
Diagonal lashing X76. Stevedoring, Lashing and Cargo Securing: Rod or chain arranged at an angle to resist combined transverse and vertical motion.
Dial Micrometer X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: High-resolution measuring instrument used for web deflections, bearing clearances, and crankshaft run-out.
Dialog (Newtec) X68. Maritime Satcom and Telecommunications: Multiservice VSAT platform from ST Engineering iDirect, formerly Newtec, used in maritime networks.
Diameter to thickness ratio X42. Offshore Wind Installation and Cable Lay: Key geometric parameter influencing monopile fatigue and buckling design.
Diamond (HMS) D34 X106. Naval Surface Combatants: Royal Navy Type 45 Daring-class destroyer, commissioned 2011.
Diamond Cut X50. Ship Recycling, Demolition and Hong Kong Convention: A precision oxy-fuel separation cut used to retain hull blocks for resale rather than scrap.
Diamond Gas Crystal X134. LNG and LPG Carrier Operators and Containment Systems: LNG carrier of 165,000 m3 delivered 2019 by Mitsubishi Shipbuilding for NYK Line and Diamond Gas Carriers.
Diamond Gas Orchid X134. LNG and LPG Carrier Operators and Containment Systems: LNG carrier of 165,000 m3 delivered 2018 by Mitsubishi Heavy Industries, sayaringo STaGE design.
Diamond Mining Vessel E4. Cruise, offshore energy and auxiliary/specialised fleets: Specialized vessel for offshore diamond extraction.
Diamond Mooring Rope X94. Port Machinery and Quay Equipment Makers: Bridon-Bekaert HMPE rope range used for high-load mooring applications on tankers and bulk carriers.
Diamond Offshore X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: US drilling contractor that operated the Ocean-series semisubmersibles before its 2024 acquisition by Noble.
Diamond Princess X24. Cruise, Passenger Ship and Ferry Operations: Princess Cruises ship subject to a major COVID-19 outbreak at Yokohama in February 2020.
Diamond Wire X13. Marine Salvage and Wreck Removal: Cable studded with industrial diamond beads used for cold cutting steel underwater.
Diamond Wire Saw X141. Marine Salvage Industry and Wreck Removal Contractors: Subsea cutting tool used by Mammoet on Tricolor (2003) and by Titan on Costa Concordia.
Diana Yacht Design X35. Yacht and Superyacht Industry: Dutch naval architecture studio based in Hardinxveld.
Dianna Cable Crossing X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Notional crossing example used in industry training for cable-pipeline interaction analysis.
Diaper-Changing Station X41. Cruise Ship Public Health and VSP/USPH: Hard-surfaced unit in child activity centers required to be sanitized between uses under VSP Item 38.
Diaphragm Cleaning X118. Ship Recycling Yards, Beaches and Regulation: Cofferdam and bulkhead cleaning of tankers before hot work, generating slop sludge that must be transferred to TSDF.
Diaphragm pump X45. Marine Paints, Coatings and Antifouling: Pneumatic transfer pump used for high-viscosity epoxy mixing and supply to spray equipment.
Diaphragm wall X175. Port Engineering, Dredging, Breakwaters, and Quays: Cast-in-place reinforced concrete wall built using bentonite-slurry trench techniques, sometimes used for quay walls in soft soils.
Diaplous X127. Maritime Security, Anti-Piracy and PMSCs: Diaplous Maritime Services, Cyprus-headquartered PMSC founded 2010 by Greek shipping interests, ISO 28007 certified.
Diaplous Maritime Services 2023 X48. Maritime Cybersecurity: Greek maritime security firm publicly reported to have suffered a cyber incident in 2023, illustrating exposure of armed guard providers.
Diapycnal Mixing D1. Physical and chemical oceanography and marine meteorology: Mixing across density surfaces in a stratified ocean.
Diatom X10. Marine Biology, Fisheries and Oceanography: Single-celled alga with silica frustule, dominant primary producer in productive seas.
Diatomaceous Earth X1. Cargo Science, Commodities and Cargo Care: Light dusty mineral cargo, Group C in IMSBC.
Diatomaceous Ooze D2. Hydrography, tides, waves, bathymetry and marine geology: Siliceous sediment dominated by diatom frustules.
Diazepam X36. Shipboard Medical, Telemedicine and Seafarer Health: Benzodiazepine for seizures and severe anxiety; controlled drug requiring register entry.
Diborane X75. IMDG Code, Classes, Packing and Segregation: UN 1911, Class 2.3 with Class 2.1 subsidiary risk.
DICASS X11. Naval Vessels, Warship Systems and Naval Architecture: Directional Command Activated Sonobuoy System.
Dichlofluanid X18. Ballast Water, Biofouling and Antifouling: Booster biocide used in some antifouling paints.
Diclofenac X36. Shipboard Medical, Telemedicine and Seafarer Health: NSAID injectable for renal colic and severe musculoskeletal pain.
Dielectric Coating X100. Marine Cathodic Protection and Anodes: The high-resistance epoxy and glass laminate forming the anode shield around ICCP anodes.
Dielectric Shield X100. Marine Cathodic Protection and Anodes: An anode-shield assembly extending 1.5 to 2 m around an ICCP anode to control current distribution and prevent paint blistering.
Dieppe X85. Ferries, Ro-Pax Operators and Routes: French Norman port hosting DFDS Seaways via Transmanche Ferries to Newhaven.
Diesel engine oil X61. Marine Lubricants and Cylinder Oils: General term covering both trunk piston engine oils and crankcase oils for compression-ignition engines.
Diesel Engine Recovery X118. Ship Recycling Yards, Beaches and Regulation: Sale of main and auxiliary engines as functional second-hand units, a notable revenue line at Alang and Aliaga.
Diesel Fuel X75. IMDG Code, Classes, Packing and Segregation: UN 1202, Class 3 flammable liquid Packing Group III when flash point at or below 60 degrees Celsius.
Diesel Fuel UN 1202 X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: A Class 3 flammable liquid, packing group III, with flashpoint above 60 deg C but historically reclassified as PG III where flashpoint is above 60 deg C and not exceeding 100 deg C if regulated as DG.
Diesel Generator Overhaul X113. Drydock and Ship Repair Yards: Drydock ashore refurbishment of auxiliary engines, including crankshaft polishing, bearing renewal, and turbocharger refurbishment.
Diesel Generator Recovery X28. Ship Recycling and End-of-Life: Removal and sale of auxiliary generators, often refurbished for reuse.
Diesel Generator Salvage X50. Ship Recycling, Demolition and Hong Kong Convention: The recovery and reconditioning of auxiliary engine alternator sets for second-hand sale.
Diesel Generator Survey X5. Marine Surveying and Inspection: Class inspection of auxiliary generators under CMS or Special Survey.
Diesel Hammer Removal X60. Marine Salvage and Wreck Removal: Use of impact hammers to extract pile sections during platform decommissioning.
Diesel hydraulic X15. Ports, Terminals and Stevedoring: power configuration on RTGs and mobile harbor cranes.
Diesel index B2. Marine Engineering: Empirical fuel ignition quality index.
Diesel Knock X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Audible combustion roughness arising from delayed ignition, monitored by indicator cards and accelerometer signatures.
Diesel Oil Survey X155. Marine Surveying Practice and Cargo Inspection: A bunker survey of marine diesel oil (MDO) or marine gas oil (MGO) including sampling for ISO 8217 conformity.
Diesel United (DU) X90. Marine Engine Specific Model Enumeration: Japanese licensed builder of Sulzer and MAN B&W two-stroke engines, later integrated into IHI Power Systems.
Diesel-electric crane X15. Ports, Terminals and Stevedoring: STS crane with diesel genset feeding electric drives.
Diesel-electric drive X38. Propellers, Stern Gear and Shaft Lines: Propulsion architecture in which the prime mover drives a generator and the propeller is electrically driven, common with podded propulsors.
Diesel-electric main propulsion X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Regulated under SOLAS II-1/41 and II-1/45, with electrical-system redundancy requirements.
Diesel-electric propulsion B2. Marine Engineering: Multiple gensets feeding propulsion motors via main bus.
Diesel-Electric Submarine (SSK) E2. Naval, defence and maritime law enforcement: Conventionally powered submarine.
Diesel-Electric Towboat X103. US Inland Waterway Towing and Barge: A towboat in which diesel engines drive generators that power electric propulsion motors.
DIESELS Algorithm X126. Marine Oil Spill Response and OPRC Regimes: NOAA tool for dispersant treatability decisions integrating viscosity and emulsion water content.
Diethyl Ether X75. IMDG Code, Classes, Packing and Segregation: UN 1155, Class 3 flammable liquid Packing Group I.
Diethylamine X75. IMDG Code, Classes, Packing and Segregation: UN 1154, Class 3 with Class 8 subsidiary risk.
Diethylene Glycol Heater X20. LNG Operations and Custody Transfer: Onshore intermediate fluid loop used in some regas vaporizers (IFV) to transfer ambient or seawater heat.
DIFAR X11. Naval Vessels, Warship Systems and Naval Architecture: Directional Frequency Analysis and Recording sonobuoy.
DIFC Courts X114. Maritime Arbitration and Shipping Law Firms: Dubai International Financial Centre Courts, English common law jurisdiction enforcing arbitration awards and maritime judgments.
Differential Aeration Cell X100. Marine Cathodic Protection and Anodes: A corrosion cell driven by variations in dissolved-oxygen concentration along a metal surface.
Differential Backup X48. Maritime Cybersecurity: Backup capturing changes since the last full backup, used in shipboard recovery planning.
Differential GNSS X109. Maritime Autonomous Surface Ships and MASS Code: Augmented satellite positioning that improves accuracy using local corrections, often used for automated docking.
Differential GNSS (DGNSS) E3. Technology, digitalization and smart shipping: Augmentation correcting GNSS errors.
Differential GPS X59. Offshore Wind O&M, CTVs and SOVs: Augmented satellite positioning system used by CTVs and SOVs to achieve sub meter accuracy near turbine structures.
Differential GPS (DGPS) D2. Hydrography, tides, waves, bathymetry and marine geology: GPS technique improving accuracy used in hydrographic surveys.
Differential Heel X9. Cargo Securing, Lashing and Stability Vocabulary: Heel arising from asymmetric loading.
Differential Loran B3. Nautical Science: Legacy differential terrestrial radionavigation.
Differential pressure X19. Engine Room Watchkeeping and UMS Operations: dP, monitored across filters and coolers to indicate fouling.
Differential Pressure Gauge X103. US Inland Waterway Towing and Barge: An instrument used to monitor cargo tank loading rates and venting on a tank barge.
Differential Pressure Hazard X82. Saturation Diving and Offshore Diving Operations: Hazard from divers working near intakes or breached compartments.
Differential Pressure Switch X63. Marine Auxiliary Machinery and Pumps: Sensor signaling clogging of filters, separators, or coolers.
Differential Protection X67. Marine Electrical Systems and Shore Power: Protection scheme comparing currents at two ends of a generator winding or transformer to detect internal faults.
Differential Route X44. Shipping Indices, FFAs and Freight Markets: Baltic route whose assessment is published as a percentage adjustment over a reference route rather than as a standalone number.
Differential settlement X15. Ports, Terminals and Stevedoring: uneven subsidence of quay foundations.
Differential Update X73. Marine Hydrography, Charting and ENC: The S-57 .001, .002, ... incremental files applied to a base cell to reflect chart corrections.
Diffraction D2. Hydrography, tides, waves, bathymetry and marine geology: Bending of waves around obstacles.
Diffraction Analysis X54. Naval Architecture Software and IACS Rules: Solution of the linearized wave diffraction problem in codes such as WADAM, WAMIT, and AQWA.
Diffraction force B1. Naval Architecture: Wave force from incident waves with the ship held fixed.
Diffuser augmented tidal turbine X57. Ocean Energy Beyond Wind: Ducted tidal stream turbine in which a shroud accelerates flow through the rotor, used in some early concepts.
Difluoromethane X75. IMDG Code, Classes, Packing and Segregation: UN 3252, Class 2.1 flammable gas.
Digger pile X42. Offshore Wind Installation and Cable Lay: Specialized pile used as a temporary template for jacket installation alignment.
Digital Forensics X48. Maritime Cybersecurity: Systematic recovery and analysis of digital evidence from shipboard systems after an incident.
Digital Selective Calling X68. Maritime Satcom and Telecommunications: VHF and MF/HF technique used in GMDSS for alerting, sometimes integrated with satellite distress paths.
Digital Selective Calling (DSC) X16. Nautical Science, Navigation and COLREGs: GMDSS technique on VHF Ch 70, MF 2187.5 kHz, HF, for distress alerting.
Digital Signature X48. Maritime Cybersecurity: Cryptographic proof of origin and integrity, used in chart updates and firmware distribution.
Digital Tug X109. Maritime Autonomous Surface Ships and MASS Code: A harbor tug equipped with digital sensing and connectivity that may be operated under remote or autonomous control.
Digital Twin X25. Maritime Cybersecurity, OT and IT: Software model of a physical asset such as a Triple-E class container ship used for performance and predictive maintenance.
Digital Twin (Ship) E3. Technology, digitalization and smart shipping: Live model mirroring vessel state for analytics.
Digital Yacht X74. AIS Data, Vessel Tracking and Maritime Intelligence: UK manufacturer of compact AIS receivers and transponders for the leisure market.
Diisooctyl Acid Phosphate X93. IBC Code and Chemical Tanker Operations: Organophosphorus liquid assigned UN 1902, carried under the IBC Code with restrictions reflecting its toxicity profile.
Dijkstra Algorithm X109. Maritime Autonomous Surface Ships and MASS Code: A classical shortest path algorithm used for global route planning in marine autonomy.
Dike X103. US Inland Waterway Towing and Barge: A river training structure projecting from the bank to direct flow and maintain channel depth.
Dikson X52. Polar Code, Arctic and Antarctic Shipping: Russian port and weather station at the western entrance of the Northern Sea Route in Krasnoyarsk Krai.
Dilbar X35. Yacht and Superyacht Industry: 156 m Lurssen-built motor yacht delivered 2016 for Alisher Usmanov, largest by gross tonnage at her delivery.
Diligence, USCGC (WMEC-616) X130. National Coast Guards and Cutter Fleets: Reliance-class medium endurance cutter commissioned 1964, homeported Pensacola, Florida.
Diluent X45. Marine Paints, Coatings and Antifouling: Solvent added in controlled quantity to adjust the application viscosity of a coating.
Diluent Type A X75. IMDG Code, Classes, Packing and Segregation: Organic liquid compatible with an organic peroxide and used to reduce concentration without lowering SADT excessively.
Diluent Type B X75. IMDG Code, Classes, Packing and Segregation: Organic liquid for diluting peroxides with boiling point at least 60 degrees Celsius above the SADT.
Dilution and Dispersion X60. Marine Salvage and Wreck Removal: Natural breakdown processes that disperse spilled oil through wave action and currents.
Dilution method X18. Ballast Water, Biofouling and Antifouling: D-1 BWE method involving simultaneous filling and discharge to achieve volumetric exchange.
DIMECC X109. Maritime Autonomous Surface Ships and MASS Code: The Finnish innovation cluster that hosts the One Sea ecosystem driving collaborative MASS development.
Dimensional Drawing X104. Project Cargo Forwarders and Heavy Transport: Scaled drawing of a project unit with all critical dimensions for transport planning.
Dimensional Tolerance X83. ISO Container Manufacturing and Leasing: Manufacturing tolerance on container length, width, and height permitted under ISO 668.
Dimethyl Sulfate X75. IMDG Code, Classes, Packing and Segregation: UN 1595, Class 6.1 with Class 8 subsidiary risk, Packing Group I.
Dimethyl Sulfide X75. IMDG Code, Classes, Packing and Segregation: UN 1164, Class 3 flammable liquid Packing Group II.
Dimethylamine Anhydrous X75. IMDG Code, Classes, Packing and Segregation: UN 1032, Class 2.1 flammable gas.
Dimethylformamide Survey Sampling X118. Ship Recycling Yards, Beaches and Regulation: Solvent occasionally used in IHM laboratory analysis of paint chip and gasket samples.
DIN 51626 X34. Decarbonization, Alternative Fuels and Carbon Pricing: German biodiesel standard sometimes referenced in marine biofuel contracts.
Dinghy X3. Ship Handling, Seamanship and Deck Vocabulary: Small open boat.
Dinghy Sailing F4. Recreational Boating, Yachting and Sport: Small-boat sailing in open or decked craft.
Dinitrogen Tetroxide X75. IMDG Code, Classes, Packing and Segregation: UN 1067, Class 2.3 toxic gas with Class 5.1 and 8 subsidiary risks.
Dinoflagellate X10. Marine Biology, Fisheries and Oceanography: Single-celled, often flagellated protist; many cause harmful algal blooms.
Diosa del Mar X128. Sail Training Ships and Tall Ship Associations: Various Latin American training craft carry traditional names; Class B and C variants appear in port visits but are not regular STI race podium vessels.
Dioxane X75. IMDG Code, Classes, Packing and Segregation: UN 1165, Class 3 flammable liquid Packing Group II.
Dip X3. Ship Handling, Seamanship and Deck Vocabulary: Lower and rehoist a flag in salute or to acknowledge a signal.
Dip (horizon) X16. Nautical Science, Navigation and COLREGs: Angle between sensible horizon and visible horizon, depending on height of eye.
Dip (magnetic) X16. Nautical Science, Navigation and COLREGs: Vertical angle the Earth's magnetic field makes with the horizontal.
Diphenylmethyl Bromide X75. IMDG Code, Classes, Packing and Segregation: UN 1770, Class 8 corrosive solid.
Diphtheria-Tetanus-Pertussis (Tdap) X36. Shipboard Medical, Telemedicine and Seafarer Health: Booster vaccine in routine seafarer vaccination schedules.
Diploma in Marine Engineering F3. Seafaring Life, Education, Professions and Institutions: Polytechnic engineering pathway in India and Singapore.
Diploma in Nautical Science X55. Marine Simulators, Training and Maritime Academies: Indian DGS pre-sea program leading to the first-year B.Sc. (Nautical Science) and cadetship at sea.
Diplomatic Clearance E1. Maritime security, geopolitics and risk: Authorization for naval/state vessel entry into foreign waters.