Glossary

Maritime glossary, terms beginning with L (page 2)

All maritime glossary terms that begin with the letter L, drawn from every subject section. 1899 entries.

Showing 250 of 1899 terms (page 2 of 8).

Lashing Points X31. Helicopter Operations on Ships: Recessed tie-down fittings around helideck for securing parked helicopter.
Lashing Pot X9. Cargo Securing, Lashing and Stability Vocabulary: Recessed deck fitting accepting twistlock or stacker.
Lashing rod X3. Ship Handling, Seamanship and Deck Vocabulary: Steel bar tensioned by a turnbuckle to lash containers.
Lashing rod, 2.2 m X76. Stevedoring, Lashing and Cargo Securing: Short lashing rod typically used to secure the first deck tier on low lashing bridges.
Lashing rod, 2.7 m X76. Stevedoring, Lashing and Cargo Securing: Mid-length lashing rod commonly used for second-tier securing.
Lashing rod, 3.5 m X76. Stevedoring, Lashing and Cargo Securing: Long lashing rod used for higher tiers on tall lashing bridges.
Lashing software, approved X76. Stevedoring, Lashing and Cargo Securing: See approved lashing software.
Lashing Stress X96. Hull Integrity Monitoring and Strain Gauges: Force in container lashing rods and turnbuckles induced by ship motions, monitored to limit overload.
Lashing Survey X5. Marine Surveying and Inspection: Inspection of cargo securing arrangement and equipment.
Lashing Wire X1. Cargo Science, Commodities and Cargo Care: Galvanized wire used to secure heavy breakbulk.
Lashing, Ladder X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: SOLAS-compliant method of fixing the lower spreader and securing the ladder to strong points on deck.
Last Cargo X29. Ship Sale and Purchase, Management Contracts and Valuation: Most recent cargo carried, important for tank cleanliness in tanker sales.
Last Cargo Verification X5. Marine Surveying and Inspection: Documentary check of last three cargoes for compatibility surveys.
Last Cash Date X49. Ship Finance, Leasing and Maritime Capital Markets: Date by which sponsor equity must be funded under a project financing.
Last Done X29. Ship Sale and Purchase, Management Contracts and Valuation: Most recent comparable sale used as valuation reference.
Last Glacial Maximum (LGM) D5. Coastal processes, sea-level, cryosphere and ocean observation science: Period of maximum global ice extent around 21,000 years ago.
Last line off X15. Ports, Terminals and Stevedoring: timestamp at unmooring marking completion of berth time.
Last mile C3. Logistics, freight forwarding and multimodal trade: Final leg of delivery to consignee.
Last Port Clearance Document X86. Port Agency, Husbandry and Disbursement: Document evidencing clearance from the previous port, required at next port.
Last Port of Call Welfare X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Particular attention given to seafarer welfare as a ship enters its final pre-relief port.
Last Three Cargoes (L3C) X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: The CDI and charterer-required record of the prior three cargoes carried in each tank, key to product compatibility.
Last Voyage Compliance X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A due-diligence concept requiring traders to consider not only the present voyage but the vessel's recent voyages for evasion red flags.
Last Voyage Insurance X118. Ship Recycling Yards, Beaches and Regulation: H and M and P and I cover specifically arranged for the delivery voyage to the recycling facility, often with restricted cover.
LAT X10. Marine Biology, Fisheries and Oceanography: Lowest Astronomical Tide.
LAT (Lowest Astronomical Tide) B3. Nautical Science: Modern chart datum.
Latch X3. Ship Handling, Seamanship and Deck Vocabulary: See pelican hook.
Latch, twistlock X76. Stevedoring, Lashing and Cargo Securing: Internal mechanism that holds a twistlock in the locked position.
Lateef X125. Superyacht Industry, Builders and Brokers: 73 m Feadship.
Lateen Rig F1. Maritime History: Triangular fore-and-aft sail of Mediterranean and Indian Ocean origin.
Lateen Sail X39. Pre-1900 Maritime History: A triangular sail set on a long yard angled across the mast, characteristic of Mediterranean rigs.
Lateen Sail Heritage F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Mediterranean and Indian Ocean rig tradition.
Latency X68. Maritime Satcom and Telecommunications: One-way delay across a satellite link, typically around 250 milliseconds for a GEO hop.
Latency Compensation X109. Maritime Autonomous Surface Ships and MASS Code: A control technique that accounts for round trip delay in remote operations to maintain stable command response.
Latent Defect X4. Marine Insurance, P&I and Claims: defect in machinery or hull not discoverable by due diligence, addressed by ITC Hulls 1/10/83 clause 6.2.2 (Inchmaree-style cover).
Latent failure X12. Maritime Casualties and Investigation: Hidden weakness in the system, often organizational, awaiting an active trigger; from Reason's model.
Latent heat X26. Reefer Containers and Cold Chain Logistics: Heat absorbed or released during phase change, dominant for ice/water and freeze-cycle cargoes.
Latent Heat Flux D1. Physical and chemical oceanography and marine meteorology: Heat exchanged with the atmosphere through evaporation or condensation.
Latent heat of vaporization X56. LNG/LPG Carriers and IGC Code: Energy required to vaporize a unit mass of LNG, approximately 510 kilojoules per kilogram for methane at atmospheric pressure.
Latent heat removal X70. Reefer Containers and Cold Chain Shipping: Component of reefer cooling load required to remove moisture and respiration heat from produce.
Lateral Acceleration X9. Cargo Securing, Lashing and Stability Vocabulary: Transverse component of motion-induced acceleration.
Lateral Loading X82. Saturation Diving and Offshore Diving Operations: Side load on the bell during launch through the splash zone.
Lateral Mark F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Channel-edge buoy or beacon under the IALA system.
Lateral mark (IALA) B3. Nautical Science: Port/starboard channel mark.
Lateral Movement X25. Maritime Cybersecurity, OT and IT: Adversary technique of pivoting from an initial foothold to other hosts.
Lateral Naval Architects X35. Yacht and Superyacht Industry: UK naval architecture studio (Bath, London) specializing in large yachts and explorers.
Lateral plan (sail NA) B1. Naval Architecture: Underwater profile area used for sail balance.
Lateral Refloating X60. Marine Salvage and Wreck Removal: Sideways translation of a grounded vessel using cross channel pulls.
Lateral vibration X38. Propellers, Stern Gear and Shaft Lines: Whirling vibration of the shaft line, calculated to ensure adequate margin from running speed.
Latex X93. IBC Code and Chemical Tanker Operations: Aqueous polymer dispersion such as natural or synthetic rubber latex assigned UN 1184 in certain regulated forms and carried under hygienic protocols.
Latex, Natural Rubber X1. Cargo Science, Commodities and Cargo Care: IBC Category Y; carried in lined or stainless tanks.
Latham and Watkins X114. Maritime Arbitration and Shipping Law Firms: International firm with an admiralty and maritime regulatory practice in London and Houston.
Latin American Petroleum Show X119. Maritime Conferences, Trade Shows and Awards: Biennial Caribbean event covering offshore and shipping.
Latin American Seafarers' Network X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Regional ISWAN-affiliated network for South and Central American port welfare.
Latitude F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Angular distance north or south of the equator.
Latitude by Polaris B3. Nautical Science: Latitude derived from altitude of Polaris.
Latitude Geodetic X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Angular coordinate measured from the equator along the meridian to the point on the reference ellipsoid, fundamental to chart construction.
Lattice Boom Crane X104. Project Cargo Forwarders and Heavy Transport: Crane with a trussed boom, the dominant type for very heavy lifts.
Latvia Bunker Service X72. Bunkering Hubs and Bunker Suppliers: Bunker supply at Ventspils and Riga by Ventbunkers and Latvijas Naftas Tranzits.
Latvia PSC X66. Port State Control and Regional MOUs: Paris MOU member State.
Latvian Maritime Academy X55. Marine Simulators, Training and Maritime Academies: Maritime education institution in Riga delivering navigation and marine engineering degrees.
Launch (action) X125. Superyacht Industry, Builders and Brokers: Floating out a hull from build hall to water.
Launch (gravity, side, float) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Methods of launching the new hull.
Launch (vessel) X125. Superyacht Industry, Builders and Brokers: A formal naming and launching ceremony, often with a bottle of champagne broken against the bow.
Launch Beam X104. Project Cargo Forwarders and Heavy Transport: Beam used to launch a bridge segment from one pier to the next.
Launch Boat (Chandler) X120. Marine Catering, Provisions and Ship Chandlers: Workboat licensed to deliver stores to anchored vessels, common at Singapore, Fujairah, and Gibraltar.
Launch cradle X58. Shipbuilding Yards and Construction: Wood or steel structure supporting the hull during dynamic launch.
Launch pilot X32. Marine Pilotage and Pilot Operations: Pilot delivered to and recovered from ships by pilot launch.
Launch Service X86. Port Agency, Husbandry and Disbursement: Boat service used for boarding officials, stores, and crew while at anchor.
Launch ways X58. Shipbuilding Yards and Construction: Lubricated greased timbers along which the cradle slides during launch.
Launch Window X82. Saturation Diving and Offshore Diving Operations: Sea state and weather envelope permitting safe bell operations.
Launch, dynamic X58. Shipbuilding Yards and Construction: Launching by gravity slide down inclined ways into the water.
Launch, end X58. Shipbuilding Yards and Construction: Stern-first dynamic launch down inclined ways.
Launch, side X58. Shipbuilding Yards and Construction: Sideways dynamic launch across a narrow waterway.
Launching X58. Shipbuilding Yards and Construction: Transfer of a newly built hull from the building berth into the water.
Launder X15. Ports, Terminals and Stevedoring: trough conveying slurry or fluidized bulk.
Laurentian Pilotage Authority X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Canadian federal Crown corporation administering compulsory pilotage on the St Lawrence River between the Escoumins and Montreal.
Lauritzen Cool X70. Reefer Containers and Cold Chain Shipping: Danish reefer operator historically active in the conventional reefer trade, merged into NYKLauritzenCool joint venture before further restructuring.
Lauritzen Kosan X134. LNG and LPG Carrier Operators and Containment Systems: Danish LPG carrier operator merged with BW Epic Kosan, operator of small scale LPG and ethylene carriers.
Lauritzen Reefers X136. Reefer Vessels and Cool Chain Operators: Danish reefer ship company under J Lauritzen A/S, sold to NYK Cool in 2000 forming a key part of LauritzenCool, later folded into Star Reefers.
Lauritzen v Larsen, 345 US 571 (1953) X143. Landmark Maritime Law Cases and Doctrines: US Supreme Court articulated seven factors for choice of law in Jones Act seafarer injury claims.
Lavatory X41. Cruise Ship Public Health and VSP/USPH: Plumbing fixture in a public restroom, distinct from a food preparation handwash sink.
Lavery, Brian X39. Pre-1900 Maritime History: Modern maritime historian, included here only as scholarly reference is not the entry's purpose; omit.
Lavinia X70. Reefer Containers and Cold Chain Shipping: Reefer shipping company name historically associated with the Mediterranean reefer trade.
Lavinia Corp X136. Reefer Vessels and Cool Chain Operators: Greek-owned reefer ship operator running conventional reefer tonnage in fruit and fish trades, historically a major Cool Carriers pool member.
Law and Arbitration Clause (BIMCO) X152. Maritime Arbitration and Dispute Resolution: BIMCO standard wording combining choice of law and arbitration, with selectable seats including London, New York, Singapore, and free choice.
Law Debenture X114. Maritime Arbitration and Shipping Law Firms: Corporate trustee occasionally appointed in ship finance disputes.
Law Enforcement Detachment (LEDET) E1. Maritime security, geopolitics and risk: USCG team embarked on partner navy ships.
Law of Naval Warfare E2. Naval, defence and maritime law enforcement: Body of law including San Remo Manual 1994.
Law of the Sea Convention 1982 A6. Public international law of the sea: UNCLOS, in force 1994.
Lay X3. Ship Handling, Seamanship and Deck Vocabulary: Direction of twist in a rope; to apply.
Lay (Rope) X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Direction and pitch of the twist of strands in a rope, normally right-hand regular lay for general service ropes.
Lay aloft X3. Ship Handling, Seamanship and Deck Vocabulary: Order to go up the rigging.
Lay back X42. Offshore Wind Installation and Cable Lay: Horizontal distance between the cable touchdown point on the seabed and the lay vessel stern chute.
Lay course B3. Nautical Science: Course steered along a planned leg.
Lay Day X84. Yacht Racing, Regattas and Sailing Governance: A non-racing day scheduled in regattas, often for rest or weather.
Lay days X3. Ship Handling, Seamanship and Deck Vocabulary: Days allowed for loading or discharging.
Lay Days Notice X86. Port Agency, Husbandry and Disbursement: Notification of charter party lay days that the vessel must meet.
Lay Member X4. Marine Insurance, P&I and Claims: Lloyd's individual Name with unlimited liability, of declining importance since corporate capital.
Lay of the land X16. Nautical Science, Navigation and COLREGs: Coastal topography as seen from seaward.
Lay Tension X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Force applied along a cable or pipeline during installation to control catenary and touchdown stresses.
Lay the course X3. Ship Handling, Seamanship and Deck Vocabulary: Sail directly toward the intended destination.
Lay Time X20. LNG Operations and Custody Transfer: Allowed cargo transfer time in charter party; standard 24 to 36 hours for full cargo operations.
Lay Tower X14. Offshore Oil and Gas Marine Operations: Vertical pipelay tower on rigid reel and J-lay vessels.
Lay Up Returns X53. Marine Insurance, P&I and Hull Clauses: Returns of premium under hull policies for periods during which the vessel is laid up in a safe port, subject to policy conditions.
Lay vessel X42. Offshore Wind Installation and Cable Lay: Vessel performing submarine cable installation.
Lay-and-bury (LAB) X122. Submarine Cable Laying, Repair Vessels and Operators: Single-pass operation where cable is laid and simultaneously buried using an in-line plough.
Lay-by berth C4. Ports, terminals and coastal/marine civil engineering: Berth used for waiting and minor operations.
Lay-up (long-term) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Owner-initiated preservation regime.
Lay-Up Period X40. Tanker Vetting, SIRE and VIQ: A period during which the vessel is not in active service, recorded in the Q88 and considered by vetting analysts.
Lay-up plan C2. Ship operations, crewing and technical management: Plan for cold or warm lay-up of the vessel.
Layback X14. Offshore Oil and Gas Marine Operations: Horizontal distance between vessel and pipeline touchdown.
Layby berth X15. Ports, Terminals and Stevedoring: berth for vessels awaiting orders or repair.
Layby Welfare X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Welfare provision for crews of vessels in long-term layup, a category with elevated abandonment risk.
Laycan C1. Commercial shipping, chartering, economics and finance: Layday and cancelling window of a voyage or time charter.
Laydown deck X59. Offshore Wind O&M, CTVs and SOVs: Open deck area aboard an SOV used to store spare parts, containers, and tooling for offshore campaigns.
Layer X4. Marine Insurance, P&I and Claims: tranche of cover in an excess of loss program.
Layered loading X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Condition in which incompatible fuels form distinct strata in the tank.
Layered Reinsurance X53. Marine Insurance, P&I and Hull Clauses: Reinsurance arranged in successive layers attaching at progressively higher amounts.
Layered Security E1. Maritime security, geopolitics and risk: Defense-in-depth combining procedural, physical, and cyber controls.
Layline X84. Yacht Racing, Regattas and Sailing Governance: The course on which a yacht can fetch the next mark on a single tack.
Layout, plate X58. Shipbuilding Yards and Construction: Nesting of plate parts on stock plates to minimize waste.
Laytime A5. Maritime Law, private and commercial: Time allowed for loading or discharging under a voyage charter.
Laytime Calculation X86. Port Agency, Husbandry and Disbursement: Calculation of allowed time used at the port, based on the Statement of Facts.
Laytime calculation house X71. Shipbrokers and Brokerage Firms: Specialist provider such as Diabos handling demurrage statements.
Laytime Calculation Statement X51. Maritime Arbitration, Law and BIMCO Clauses: A document setting out time used, time exempt, and time available to support a claim for demurrage or dispatch.
Laytime Definitions X114. Maritime Arbitration and Shipping Law Firms: Voylayrules 1993, sponsored by BIMCO and FONASBA, often invoked in laytime arbitrations.
Laytime Definitions for Charter Parties 2013 X17. Chartering, Shipbroking and Freight Trading: Standard BIMCO/CMI/FONASBA/INTERCARGO/INTERTANKO definitions of laytime terms.
Laytime statement C1. Commercial shipping, chartering, economics and finance: Accounting of laytime used and demurrage or despatch due.
Layup Survey X5. Marine Surveying and Inspection: Inspection before, during, and after vessel layup; required by insurers.
Lazard Maritime X49. Ship Finance, Leasing and Maritime Capital Markets: Lazard advisory team active in shipping restructurings and M&A mandates.
Lazaret X3. Ship Handling, Seamanship and Deck Vocabulary: Storeroom in the after part of the vessel.
Lazarette X35. Yacht and Superyacht Industry: Below-deck stern compartment used for stowage and machinery.
Lazaro Cardenas APM X138. Global Container Terminal Operators and Port Equipment: Mexican Pacific facility commissioned 2017 with 1.2 million TEU capacity, the country's first semi-automated terminal.
Lazarus Group X139. Maritime Cybersecurity, OT Threats and Standards: DPRK threat actor sanctioned by OFAC in September 2019 and linked to maritime supply chain incidents.
Lazy guy X3. Ship Handling, Seamanship and Deck Vocabulary: Light rope to steady a boom.
Lazy Wave Configuration X91. Submarines and Submarine Cable Systems: Riser cable layout including buoyancy modules used in dynamic subsea connections.
LBCT (Long Beach Container Terminal) X94. Port Machinery and Quay Equipment Makers: Pier E terminal at the Port of Long Beach using Kalmar ASCs and automated horizontal transport.
LBG X112. IMO GHG Strategy, CII, EEXI and EU Maritime Regulation: Liquefied Biogas, renewable equivalent of LNG produced from biomethane.
LBL X65. ROVs, AUVs, USVs and Marine Robotics: Long baseline acoustic positioning that triangulates a subsea vehicle against a transponder array on the seabed.
LBO Bunker Survey X72. Bunkering Hubs and Bunker Suppliers: Common abbreviation in bunker survey reports for Last Before Order condition.
LBP X15. Ports, Terminals and Stevedoring: Length Between Perpendiculars, basis for many berth design calculations.
LBP length between perpendiculars X162. Naval Architecture, Stability, Resistance, and Structural Design: Horizontal distance from forward perpendicular to aft perpendicular, the standard length for hydrostatic and rule calculations.
LBS College X121. Maritime Education, Academies and Universities: See Lal Bahadur Shastri College.
LBV X56. LNG/LPG Carriers and IGC Code: LNG bunker vessel, a small-scale LNG carrier configured for ship-to-ship LNG fuel delivery.
LBV (LNG Bunker Vessel) X149. Marine Fuels, Bunkering, and Alternative Fuels: A purpose-built or converted vessel that delivers LNG bunkers ship-to-ship to LNG-fueled ships.
LC (Lashing Capacity) X9. Cargo Securing, Lashing and Stability Vocabulary: See Lashing Capacity.
LC/LD50 D3. Marine environmental science, pollution and conservation: Concentration or dose lethal to 50 percent of test organisms.
LC50 X75. IMDG Code, Classes, Packing and Segregation: Lethal concentration killing 50 percent of test population, criterion for Class 6.1 and 2.3 classification.
LCA (Life Cycle Assessment) X34. Decarbonization, Alternative Fuels and Carbon Pricing: WtW analysis of GHG emissions covering production, distribution, and use of a fuel.
LCAC X11. Naval Vessels, Warship Systems and Naval Architecture: Landing Craft, Air Cushion, USN amphibious hovercraft.
LCAC (Landing Craft Air Cushion) X106. Naval Surface Combatants: US Navy hovercraft used for ship-to-shore movement of cargo and personnel, in service since 1986.
LCB longitudinal center of buoyancy X162. Naval Architecture, Stability, Resistance, and Structural Design: Longitudinal coordinate of the center of buoyancy, expressed as percentage of LBP forward or aft of amidships.
LCC X11. Naval Vessels, Warship Systems and Naval Architecture: Amphibious command ship hull symbol.
LCF longitudinal center of flotation X162. Naval Architecture, Stability, Resistance, and Structural Design: Longitudinal coordinate of the center of flotation about which the ship trims.
LCG longitudinal center of gravity X162. Naval Architecture, Stability, Resistance, and Structural Design: Longitudinal coordinate of the ship's center of gravity.
LCH X44. Shipping Indices, FFAs and Freight Markets: London Clearing House (LCH.Clearnet), an early clearer of dry FFAs whose role evolved alongside SGX, CME, EEX, and the discontinued NOS Clearing.
LCH ForexClear X161. Shipbroking, Freight Derivatives, and Baltic Indices: London Clearing House service that has historically cleared freight contracts alongside FX derivatives.
LCH.Clearnet X161. Shipbroking, Freight Derivatives, and Baltic Indices: Group central counterparty providing clearing services for freight, energy, and rates derivatives.
LCIA X114. Maritime Arbitration and Shipping Law Firms: London Court of International Arbitration, institution founded in 1892, administering disputes under the LCIA Arbitration Rules 2020.
LCIA Arbitration Rules 2020 X114. Maritime Arbitration and Shipping Law Firms: Rules in force from 1 October 2020 setting procedures and arbitrator selection.
LCL C3. Logistics, freight forwarding and multimodal trade: Less than container load.
LCL Liquid Cargo Load X70. Reefer Containers and Cold Chain Shipping: Star Cool feature using initial oxygen depletion to accelerate respiration-driven atmosphere conditioning.
LCL Stores Consolidation X120. Marine Catering, Provisions and Ship Chandlers: Less-than-container-load consolidation by major chandlers for inter-port delivery.
LCM Commodities X71. Shipbrokers and Brokerage Firms: US-based futures and physical brokerage with shipping affiliations.
LCO X47. Marine Fuel Quality and ISO 8217: Light cycle oil from FCC, a refinery blendstock contributing aromatic content to VLSFO blends.
LCO2 (Liquid CO2) X34. Decarbonization, Alternative Fuels and Carbon Pricing: Liquefied carbon dioxide carried in IGC Code Type C tanks at low temperature and moderate pressure.
LCO2 carrier X34. Decarbonization, Alternative Fuels and Carbon Pricing: Vessel transporting liquefied CO2 from capture sites to offshore storage; e.g. Northern Lights shuttles.
LCOE X42. Offshore Wind Installation and Cable Lay: Levelized Cost of Energy, the discounted lifetime cost per unit of energy produced, used in offshore wind economic assessment.
LCOE (marine) X57. Ocean Energy Beyond Wind: Levelized cost of energy used to compare tidal, wave, OTEC, floating solar, and offshore hydrogen against benchmarks.
LCS X8. IACS, Class Rules and Class Notations: Lashing Computer System notation issued by DNV and others for container securing software.
LCS (Littoral Combat Ship) X132. High-Speed Craft, Hydrofoils and Ferry Operators: US Navy Independence class trimaran built by Austal USA in Mobile.
LCS MCM Mission Package X77. Naval Mine Warfare and Mine Countermeasures: The US Navy Littoral Combat Ship mine countermeasures payload comprising RMMV, Knifefish, COBRA, ALMDS, AMNS, and the UISS unmanned sweep.
LCS welding consumable B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Low-hydrogen weld metal for HT steel.
LCT (Landing Craft Tank) B5. Ship Types and Individual Vessels: Amphibious landing craft.
LCU X11. Naval Vessels, Warship Systems and Naval Architecture: Landing Craft, Utility.
LCU (Landing Craft Utility) X106. Naval Surface Combatants: US Navy displacement landing craft used for over-the-beach movement of vehicles and cargo.
LCV (Lower Calorific Value) X149. Marine Fuels, Bunkering, and Alternative Fuels: The net calorific value of a fuel, excluding the latent heat of water vapor; used in FuelEU Maritime energy calculations.
LD Compressor X20. LNG Operations and Custody Transfer: Low-duty compressor handling steady-state BOG to GCU or engines during voyage.
LD50 X75. IMDG Code, Classes, Packing and Segregation: Lethal dose killing 50 percent of test population, criterion for oral and dermal toxicity in Class 6.1.
LDBF (Line Design Break Force) X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: OCIMF MEG4 term for the certified MBL of the line used in design, with allowances for splices and tails.
LDC D3. Marine environmental science, pollution and conservation: London Dumping Convention; see London Convention.
LDL X61. Marine Lubricants and Cylinder Oils: Load Dependent Lubrication, a control strategy that scales cylinder oil feed rate to engine load.
LDLG X126. Marine Oil Spill Response and OPRC Regimes: Limit Discharge Limit Gauge.
LDT X50. Ship Recycling, Demolition and Hong Kong Convention: Light Displacement Tonnage, the weight of the empty ship excluding cargo, fuel, ballast, and consumables, used as the principal demolition pricing basis.
LDT Light Displacement Tonnage X28. Ship Recycling and End-of-Life: Mass of the empty ship without fuel, ballast, stores, or cargo, the demolition pricing base.
LDT Pricing Basis X50. Ship Recycling, Demolition and Hong Kong Convention: The US dollar per LDT formula used in demolition sale contracts.
LE (Limited Editions) X35. Yacht and Superyacht Industry: Amels semi-custom series sold as Damen Yachting Limited Editions.
Le Bellot X97. Polar Expedition Cruise and IAATO Operations: Ponant Explorer-class ship delivered in 2020 with 184 PAX.
Le Boreal X64. Cruise Industry Operators, Brands and Ships: Ponant expedition vessel delivered in 2010.
Le Bougainville X64. Cruise Industry Operators, Brands and Ships: Ponant Explorer-class vessel delivered in 2019.
Le Champlain X64. Cruise Industry Operators, Brands and Ships: Ponant Explorer-class vessel delivered in 2018.
Le Commandant Charcot X64. Cruise Industry Operators, Brands and Ships: Ponant LNG and battery hybrid icebreaking expedition vessel delivered in 2021.
Le Dumont d'Urville X64. Cruise Industry Operators, Brands and Ships: Ponant Explorer-class vessel delivered in 2019.
Le Grand Bleu X35. Yacht and Superyacht Industry: 112 m yacht built by Bremer Vulkan in 2000.
Le Havre X84. Yacht Racing, Regattas and Sailing Governance: French port that has been the start of the Transat Jacques Vabre since 1993.
Le Havre LNG Bunkering X110. LNG Bunkering Infrastructure and Vessels: LNG bunker operations at the Port of Le Havre, France, including TotalEnergies Marine Fuels deliveries via Gas Vitality.
Le Havre Pilots X32. Marine Pilotage and Pilot Operations: French pilots' service covering Le Havre and Rouen on the Seine estuary.
Le Havre Port 2000 X138. Global Container Terminal Operators and Port Equipment: French Atlantic container facility operated by Terminal de France GMP, Terminal Porte Oceane and Terminal de Normandie MSC.
Le Jacques Cartier X64. Cruise Industry Operators, Brands and Ships: Ponant Explorer-class vessel delivered in 2021.
Le Laperouse X64. Cruise Industry Operators, Brands and Ships: Ponant Explorer-class vessel delivered in 2018.
Le Lyrial X64. Cruise Industry Operators, Brands and Ships: Ponant Sisterships vessel delivered in 2015.
Le Ponant X64. Cruise Industry Operators, Brands and Ships: Three-masted sailing yacht operated by Ponant since 1991.
Le Renard X128. Sail Training Ships and Tall Ship Associations: French topsail cutter replica built 1991 at Saint Malo of Robert Surcouf's 1812 corsair, 31 m length, sail training under STI Class B.
Le Shuttle X85. Ferries, Ro-Pax Operators and Routes: Eurotunnel drive-on rail shuttle through the Channel Tunnel.
Le Soleal X64. Cruise Industry Operators, Brands and Ships: Ponant expedition vessel delivered in 2013.
Leached layer X45. Marine Paints, Coatings and Antifouling: Surface layer of a depleted antifouling paint film from which biocide has been released.
Leaching rate X18. Ballast Water, Biofouling and Antifouling: Mass of antifouling biocide released per unit area per day; regulated by some jurisdictions.
Lead X3. Ship Handling, Seamanship and Deck Vocabulary: Sounding weight on a marked line.
Lead (of Line) X30. Tug Operations and Harbour Towage: Direction in which a line is rigged from the tug to the assisted vessel.
Lead (Sea Ice) D5. Coastal processes, sea-level, cryosphere and ocean observation science: Linear opening in sea ice cover.
Lead acid batteries X147. Ship Recycling, Hong Kong Convention, and Recycling Yards: Onboard items requiring removal and proper handling under both Basel and HKC regimes.
Lead anchor X42. Offshore Wind Installation and Cable Lay: Foremost anchor in an anchored cable lay or installation barge spread.
Lead Barge X103. US Inland Waterway Towing and Barge: The barge at the head of a tow that is first to encounter current, wind and obstructions.
Lead Concentrate X1. Cargo Science, Commodities and Cargo Care: Heavy Group A IMSBC bulk; toxic dust.
Lead Ingots X1. Cargo Science, Commodities and Cargo Care: Heavy breakbulk; floor-loaded.
Lead investigating state X12. Maritime Casualties and Investigation: State responsible for conducting the safety investigation under the Casualty Code.
Lead Line F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Traditional weighted line for taking soundings.
Lead pilot X32. Marine Pilotage and Pilot Operations: Senior pilot in a multi-pilot operation.
Lead Seal (Bonded) X120. Marine Catering, Provisions and Ship Chandlers: Customs seal applied to bonded locker, identified by serial number on master's bond list.
Lead Shielding (Marine) D3. Marine environmental science, pollution and conservation: Use of lead as ballast historically; legacy pollution concern.
Lead time X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Notice period between bunker nomination and delivery.
Lead Underwriter X53. Marine Insurance, P&I and Hull Clauses: The first underwriter to subscribe to a slip, with authority on the placing slip to negotiate terms binding on following markets in defined respects.
Lead-and-line sweep X77. Naval Mine Warfare and Mine Countermeasures: A historical depth-measuring technique adapted in early minesweeping to characterize bottomed contacts.
Lead-Silver Anode X100. Marine Cathodic Protection and Anodes: An older impressed-current anode material of Pb-Ag alloy used in marine ICCP installations before mixed-metal oxides became standard.
Lead, Flaw X52. Polar Code, Arctic and Antarctic Shipping: WMO term for a passageway between pack ice and fast ice.
Leadenhall X42. Offshore Wind Installation and Cable Lay: Reference London insurance market location for offshore wind risk underwriting.
Leader (convoy) X27. Polar Code, Ice Navigation and Polar Operations: Foremost vessel in a convoy through ice; usually the icebreaker.
Leader, Slip X117. Marine Insurance Markets, Captives and Reinsurance: The underwriter who first signs and sets terms on a Lloyd's slip.
Leadership and Management X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Table A-II/2 and A-III/2 competence at management level, often delivered as a HELM Management course.
Leadership and Managerial Skills Course X55. Marine Simulators, Training and Maritime Academies: STCW Regulation II/2 and III/2 course at the management level aligned with IMO Model Course 1.40.
Leadership and Teamwork Course X55. Marine Simulators, Training and Maritime Academies: STCW Regulation II/1 and III/1 operational-level course aligned with IMO Model Course 1.39.
Leadership and Teamworking X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Table A-II/1 and A-III/1 competence at operational level, delivered as HELM Operational.
Leading edge protection X59. Offshore Wind O&M, CTVs and SOVs: Polyurethane tape, shells, or coatings applied to blade leading edges to resist erosion.
Leading edge repair X59. Offshore Wind O&M, CTVs and SOVs: Process of restoring a degraded blade leading edge using filler, laminate, and protective coating.
Leading lights X15. Ports, Terminals and Stevedoring: aligned shore lights marking a channel centerline.
Leading line X16. Nautical Science, Navigation and COLREGs: Line passing through two leading marks indicating a safe approach.
Leading Underwriter X4. Marine Insurance, P&I and Claims: first underwriter to sign the slip, whose decisions on certain matters bind the following market.
Leading Underwriter Agreement X53. Marine Insurance, P&I and Hull Clauses: The market agreement defining the authority of the lead underwriter to agree certain matters on behalf of following markets.
Leading Underwriter Agreement (LUA) X4. Marine Insurance, P&I and Claims: market protocol defining the leader's authority.
Leadline X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Pre-electronic depth-measurement tool consisting of a marked rope and weighted lead, occasionally still carried for backup checks.
Leadsman X3. Ship Handling, Seamanship and Deck Vocabulary: Sailor who heaves the lead.
Leadwire Termination X96. Hull Integrity Monitoring and Strain Gauges: Soldered or crimped connection joining a strain gauge to its instrumentation cable.
Leak Detection at Yard X50. Ship Recycling, Demolition and Hong Kong Convention: The atmospheric monitoring for fugitive emissions during dismantling operations.
Leak off X19. Engine Room Watchkeeping and UMS Operations: Drain line returning controlled leakage from injectors and high pressure pumps.
Leak Test X5. Marine Surveying and Inspection: Pneumatic, hydraulic, or vacuum test for tightness.
Leakage Claim X1. Cargo Science, Commodities and Cargo Care: Cargo loss due to packaging or tank failure.
Leakproofness Test X75. IMDG Code, Classes, Packing and Segregation: Pressure test required on certain liquid packagings under IMDG 6.1.5.4.
Lean Duplex X92. Marine Steel Suppliers and Shipbuilding Plate: Family of low alloy duplex stainless steels such as 2304 offering reduced nickel and molybdenum content.
Lean Marine FuelOpt X78. Voyage Optimization and Vessel Performance Software: A propulsion control system that automatically modulates power to maintain a target speed, fuel rate, or thrust set point selected by the operator.
Leander class X11. Naval Vessels, Warship Systems and Naval Architecture: Royal Navy Cold War general-purpose frigate, widely exported.