Glossary

Maritime glossary, terms beginning with O (page 2)

All maritime glossary terms that begin with the letter O, drawn from every subject section. 1233 entries.

Showing 250 of 1233 terms (page 2 of 5).

OEUK X14. Offshore Oil and Gas Marine Operations: Offshore Energies UK; trade body (formerly Oil and Gas UK).
OEWG Open-Ended Working Group X28. Ship Recycling and End-of-Life: Subsidiary body of the Basel Convention preparing decisions for the COP.
OFAC A7. Compliance, certification and enforcement: US Office of Foreign Assets Control, administers maritime sanctions.
OFAC (Office of Foreign Assets Control) E1. Maritime security, geopolitics and risk: US Treasury sanctions enforcement body.
OFAC 50% Rule E1. Maritime security, geopolitics and risk: Sanctions extending to entities 50%+ owned by SDNs.
OFAC Advisory on Sanctions Risks for the Maritime Industry (2020) E1. Maritime security, geopolitics and risk: Tripartite advisory with State/USCG.
OFAC Compliance Commitments (May 2 2019) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A framework document outlining management commitment, risk assessment, internal controls, testing, and training as the basis of an effective sanctions compliance program.
OFAC Iran Maritime Advisory (October 11 2018) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: An advisory predating the 2020 multi-program version specifically targeting Iranian shipping evasion.
OFAC Maritime Industry Advisory (May 14 2020) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: The comprehensive advisory enumerating deceptive shipping practices and recommending controls across the maritime ecosystem.
OFAC Recent Actions Page X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: The Treasury web page where new designations and General Licenses are first published in machine-readable form.
OFAC Sanctions Advisory on Ransomware X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: The US Office of Foreign Assets Control 2021 advisory clarifying sanctions risk when paying ransoms, directly relevant to shipping victims.
OFAC SDN List X22. Piracy, Maritime Security and Armed Protection: US Treasury Specially Designated Nationals list naming sanctioned persons and vessels.
OFAC Specially Designated Nationals (SDN) List E1. Maritime security, geopolitics and risk: Primary US designations list.
Ofcom Maritime Radio Exam Centre X121. Maritime Education, Academies and Universities: UK regulator administering GMDSS GOC/LRC exams.
OFDM Marine X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: Term applied to solid-state radar waveform schemes used by some SSR transceivers for low-power compression.
Off and fair X3. Ship Handling, Seamanship and Deck Vocabulary: Remove a fitting, repair it, and refit.
Off Course Alarm X89. ECDIS and Bridge Equipment Makers: HCS function alerting the watch when actual heading deviates from the set heading beyond a configurable threshold.
Off Hire Calculation for Underperformance X78. Voyage Optimization and Vessel Performance Software: The process of determining time and bunker losses attributable to a vessel's failure to meet warranted speed and consumption, expressed as off hire and bunker deductions.
Off Specification Cargo X20. LNG Operations and Custody Transfer: Cargo failing GHV, Wobbe, or hydrocarbon limit; subject to claim under sale agreement.
Off the wind X3. Ship Handling, Seamanship and Deck Vocabulary: Sailing with the wind abaft the beam.
Off-Centre Loading X9. Cargo Securing, Lashing and Stability Vocabulary: Asymmetric loading inducing list.
Off-Charter Survey X43. Marine Surveying and Warranty Surveying: See off-hire survey, the inspection at redelivery from a time charter.
Off-cuts X58. Shipbuilding Yards and Construction: Plate scrap remaining after nested cutting.
Off-design analysis X38. Propellers, Stern Gear and Shaft Lines: Propeller performance analysis at operating points other than the design J.
Off-dock CY X15. Ports, Terminals and Stevedoring: container yard outside the marine terminal footprint.
Off-dock facility C3. Logistics, freight forwarding and multimodal trade: Terminal facility outside the main port area.
Off-dock rail X15. Ports, Terminals and Stevedoring: rail terminal not directly connected to quay rails.
Off-Dock Yard X169. Container Terminal Cranes, Yard Equipment, and Lashing: Container storage facility outside the secured terminal perimeter, used for empties and overflow.
Off-Hire A5. Maritime Law, private and commercial: Period under a time charter during which hire ceases due to specified events.
Off-Hire Bunker Survey X155. Marine Surveying Practice and Cargo Inspection: A survey conducted at the redelivery of a time chartered vessel to determine the quantity of bunkers handed back to owners.
Off-Hire Cargo Survey X1. Cargo Science, Commodities and Cargo Care: Cargo audit during change of charterers.
Off-Hire Clause X51. Maritime Arbitration, Law and BIMCO Clauses: A time charter provision specifying events suspending the obligation to pay hire.
Off-Hire Condition Survey X155. Marine Surveying Practice and Cargo Inspection: The inspection at redelivery of a time chartered vessel, comparing condition against the on-hire baseline.
Off-Hire Demolition Sale X50. Ship Recycling, Demolition and Hong Kong Convention: A sale and delivery sequence following the redelivery of a chartered vessel to the registered owner.
Off-hire dispute X152. Maritime Arbitration and Dispute Resolution: Common time charter arbitration over periods during which hire is not payable under clause 15 (NYPE 1946) or equivalent.
Off-Hire Insurance X117. Marine Insurance Markets, Captives and Reinsurance: Loss of hire insurance covering charter income lost while a vessel is undergoing covered repairs.
Off-Hire Period X40. Tanker Vetting, SIRE and VIQ: A period during which the vessel is not earning hire, reflected in the inspection and trading history reviewed by charterers.
Off-hire survey C2. Ship operations, crewing and technical management: Joint survey at redelivery.
Off-Load Tap Changer X67. Marine Electrical Systems and Shore Power: Manual tap changer on a marine transformer adjusted only when de-energized.
Off-Position Indicator X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: AIS AtoN flag in Message 21 indicating the buoy has drifted from its assigned position.
Off-Potential X100. Marine Cathodic Protection and Anodes: A potential reading taken with all CP current interrupted; see instant-off.
Off-shore pilot X32. Marine Pilotage and Pilot Operations: Pilot of an offshore station outside port limits.
Off-spec bunker X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Fuel found to deviate from contractual or ISO 8217 limits after testing.
Off-Spec Cable Section (OSS) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Cable length removed during repair when conductor or armor parameters drift outside acceptance limits.
Off-spec Fuel X69. EGCS Scrubbers, SCR and Marine Air Emissions: Marine fuel found not to meet declared sulfur content on testing.
Off-Spec Survey X43. Marine Surveying and Warranty Surveying: A cargo inspection triggered when sampling indicates the parcel does not meet contractual specifications, supporting claims or rejection.
Off-specification fuel X47. Marine Fuel Quality and ISO 8217: Bunker that does not meet a specified parameter on test, triggering claims under the bunker contract.
Off-Station Alarm X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Watch function on AtoN telemetry detecting movement beyond a watch circle.
Off-take X42. Offshore Wind Installation and Cable Lay: Power Purchase Agreement or merchant route under which offshore wind generation is sold.
Off-take meter X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Meter at the bunker barge measuring delivered volume or mass.
Off-the-Books Voyage X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A voyage undertaken with AIS off and undeclared documentation, a hallmark of dark-fleet operation.
Offboard mine countermeasures X77. Naval Mine Warfare and Mine Countermeasures: A doctrinal shift toward conducting MCM operations from unmanned surface, undersea, and airborne systems rather than from manned MCMVs in the threat area.
Offer X71. Shipbrokers and Brokerage Firms: Price and terms communicated by a principal through the broker channel.
Offer Memorandum X28. Ship Recycling and End-of-Life: Cash buyer's marketing document setting out vessel particulars for recycling sale.
Office of Cable Television and Broadcast Services (FCC) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: US regulator overseeing cable landing licenses, working with Team Telecom.
Office of Financial Sanctions Implementation (OFSI) E1. Maritime security, geopolitics and risk: UK Treasury counterpart to OFAC.
Office of Investigations and Casualty Analysis (USCG) X163. Marine Accident Investigation Agencies and Landmark Inquiries: United States Coast Guard office that administers Marine Boards of Investigation, Formal Investigations, and Informal Investigations under 46 USC and 46 CFR Part 4.
Office of Polar Programs X133. Polar Research Vessels and Polar Code Regimes: NSF division contracting Edison Chouest for USAP vessels and Leidos for ASC.
Officer in Charge (OIC) X146. Port State Control Regimes, MoUs, and Inspection Systems: The PSC officer leading the inspection.
Officer in Charge of a Navigational Watch X7. Flag State, Port State Control and Detention Vocabulary: OICNW, STCW certified position commonly checked in PSC.
Officer in Charge of a Navigational Watch (OOW Deck) X160. Maritime Academies, Universities, and STCW Certification: STCW A-II/1 certified deck officer in charge of a navigational watch on ships of 500 GT or more.
Officer in Charge of a Navigational Watch Course X55. Marine Simulators, Training and Maritime Academies: STCW Regulation II/1 operational-level course aligned with IMO Model Course 7.03.
Officer in Charge of an Engineering Watch (EOOW) X160. Maritime Academies, Universities, and STCW Certification: STCW A-III/1 certified engineer officer in charge of an engineering watch on ships powered by main propulsion of 750 kW or more.
Officer in Charge of an Engineering Watch Course X55. Marine Simulators, Training and Maritime Academies: STCW Regulation III/1 operational-level course aligned with IMO Model Course 7.04.
Officer in Charge of Navigational Watch X66. Port State Control and Regional MOUs: STCW II/1 certification checked during PSC.
Officer Matrix X40. Tanker Vetting, SIRE and VIQ: See Crew Matrix.
Officer Matrix Verification X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: The SIRE chapter check confirming all officers meet the operator's experience matrix for the vessel and trade.
Officer of the watch X32. Marine Pilotage and Pilot Operations: Bridge officer monitoring the conduct of the ship while the pilot advises.
Officer of the Watch (OOW) F3. Seafaring Life, Education, Professions and Institutions: STCW certified navigation watchkeeper.
Officer Welfare X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Particular subset of seafarer welfare addressing high-stress senior ranks.
Officer's Endorsement Check X5. Marine Surveying and Inspection: Verification of officer certificates and endorsements under STCW.
Officer's Mess Stores X120. Marine Catering, Provisions and Ship Chandlers: Separately stocked crockery and glassware under IMPA 174201 series.
Official ENC X73. Marine Hydrography, Charting and ENC: An ENC issued by or under the authority of a national HO, the only category meeting SOLAS V/19.
Official Languages A1. The IMO and the international regulatory framework: Arabic, Chinese, English, French, Russian, and Spanish.
Official Number Verification X5. Marine Surveying and Inspection: Confirmation of registration markings during pre-purchase surveys.
Offing X3. Ship Handling, Seamanship and Deck Vocabulary: Open sea visible from shore.
Offsets table B1. Naval Architecture: Tabulated half-breadths defining hull lines.
Offshore X10. Marine Biology, Fisheries and Oceanography: Waters beyond the inshore zone, often beyond the continental shelf.
Offshore Aquaculture D4. Fisheries, aquaculture, blue economy and marine resources: Aquaculture in exposed offshore waters.
Offshore broker X71. Shipbrokers and Brokerage Firms: Broker specializing in OSVs, anchor handlers, and offshore construction vessels.
Offshore Bunker Delivery X86. Port Agency, Husbandry and Disbursement: Bunker delivery at an offshore location rather than alongside.
Offshore Cable Installation Vessel (OCIV) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Vessel class encompassing modern dedicated cableships such as NKT Victoria and Leonardo da Vinci.
Offshore Catering Standard X120. Marine Catering, Provisions and Ship Chandlers: NORSOK S-002 applies to Norwegian Continental Shelf installations, with stricter calorie and nutrition specs than MLC baseline.
Offshore coating X45. Marine Paints, Coatings and Antifouling: Protective coating system for offshore structures, typically thicker and more durable than commercial ship coatings.
Offshore Combat (Cruise) E4. Cruise, offshore energy and auxiliary/specialised fleets: Misuse-tag; no such term, not included.
Offshore Construction Survey X43. Marine Surveying and Warranty Surveying: A warranty attendance covering installation of jackets, topsides, subsea structures, and pipelines in offshore field developments.
Offshore Construction Vessel (OCV) B5. Ship Types and Individual Vessels: Vessel for subsea installation.
Offshore Container X75. IMDG Code, Classes, Packing and Segregation: Container designed for transport between vessels and offshore installations, must still meet IMDG container requirements when carrying dangerous goods.
Offshore CP X100. Marine Cathodic Protection and Anodes: Cathodic protection applied to fixed and floating offshore structures, typically using aluminum sacrificial anodes designed for 25 to 30 year life at 80 to 120 mA/m^2.
Offshore Crew Transfer X86. Port Agency, Husbandry and Disbursement: Transfer of crew offshore at sea or at outer anchorages.
Offshore Decommissioning X60. Marine Salvage and Wreck Removal: Removal of offshore oil and gas installations at the end of field life.
Offshore Energy Exhibition and Conference X119. Maritime Conferences, Trade Shows and Awards: Annual Amsterdam offshore wind and oil event organized by Navingo.
Offshore Exclusion Clauses X108. Marine Insurance and P&I Clubs: Specialty wordings restricting P&I cover for vessels engaged in offshore construction, drilling, or accommodation work.
Offshore Heavy Transport Tug X137. Harbour Tugs, Towage Operators and Tug Builders: Larger ocean tug, outside core harbour scope but often dual-roled by operators like SAAM and Boluda.
Offshore induction X59. Offshore Wind O&M, CTVs and SOVs: Site specific safety briefing required of all personnel before first attendance at a wind farm.
Offshore Mariculture Conference X119. Maritime Conferences, Trade Shows and Awards: Annual aquaculture engineering event organized by Mercator Media.
Offshore Northern Seas (ONS) X119. Maritime Conferences, Trade Shows and Awards: Biennial Stavanger oil and gas exhibition since 1974.
Offshore Patrol Cutter X130. National Coast Guards and Cutter Fleets: USCG OPC program designation WMSM, Heritage-class, see Argus.
Offshore Patrol Vessel (OPV) B5. Ship Types and Individual Vessels: Coast guard patrol vessel.
Offshore Patrol Vessels Conference X119. Maritime Conferences, Trade Shows and Awards: Annual defense conference held in Asia and Europe.
Offshore Personal Safety Course F4. Recreational Boating, Yachting and Sport: World Sailing approved safety training under OSR 6.01.
Offshore Pipeline Operators Committee (OPOC) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: US industry coordinator for Gulf of Mexico pipeline operations and emergency response.
Offshore Pollution Liability Agreement (OPOL) X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets: Voluntary scheme for North Sea operators, administered from London.
Offshore SAR X80. Maritime Search and Rescue Coordination: SAR conducted beyond the territorial sea but within an SRR.
Offshore Service Vessel (OSV) B3. Nautical Science: Specialized class with own nav considerations.
Offshore Service Vessel Simulator X55. Marine Simulators, Training and Maritime Academies: Bridge simulator with anchor handling, supply, and DP scenarios configured for OSV operations.
Offshore Special Regulations (OSR) F4. Recreational Boating, Yachting and Sport: World Sailing offshore-race safety rules.
Offshore substation X42. Offshore Wind Installation and Cable Lay: Platform mounted electrical hub stepping up array cable voltage for export.
Offshore Substation Installation Vessel E4. Cruise, offshore energy and auxiliary/specialised fleets: Vessel installing wind-farm substations.
Offshore Substation Platform (OSP) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Platform collecting inter-array power and stepping up voltage for export to shore via subsea cable.
Offshore Supply Vessel (OSV) E4. Cruise, offshore energy and auxiliary/specialised fleets: Generic offshore support vessel.
Offshore Supply Vessel Conversion X60. Marine Salvage and Wreck Removal: Adaptation of OSVs for salvage support including pumping and dive operations.
Offshore Support Journal Conference X119. Maritime Conferences, Trade Shows and Awards: Annual OSV market event hosted by Riviera Maritime Media in London.
Offshore support vessel C1. Commercial shipping, chartering, economics and finance: OSV, vessel serving offshore oil, gas, or wind operations.
Offshore Support Vessel Loan X49. Ship Finance, Leasing and Maritime Capital Markets: Loan secured by OSV tonnage, severely tested in the 2014 to 2017 downturn.
Offshore Technology Conference (OTC) X119. Maritime Conferences, Trade Shows and Awards: Annual upstream oil and gas exhibition at NRG Park, Houston, since 1969.
Offshore Technology Conference Asia X119. Maritime Conferences, Trade Shows and Awards: Biennial OTC edition held in Kuala Lumpur since 2014.
Offshore Technology Conference Brasil X119. Maritime Conferences, Trade Shows and Awards: Biennial Rio de Janeiro edition launched 2011.
Offshore terminal C4. Ports, terminals and coastal/marine civil engineering: SPM, CALM, or SBM offshore loading terminal.
Offshore Unit Recycling X50. Ship Recycling, Demolition and Hong Kong Convention: The dismantling of mobile offshore drilling units, FPSOs, and accommodation barges, with separate complexity from merchant tonnage.
Offshore Vessel Simulator X144. Bridge Simulators, Engine Room Simulators, and Maritime Training Equipment: Anchor handling, supply, and crane operation simulator at Kongsberg Norwegian Maritime Competence Centre, Alesund.
Offshore Wind X124. Dredging Industry and Reclamation Contractors: Adjacent market for dredging via rock placement, scour protection and cable trenching, dominated by Boskalis Subsea, DEME Offshore and Van Oord Offshore Wind.
Offshore Wind Foundation X104. Project Cargo Forwarders and Heavy Transport: Monopile, jacket, or floater foundation transported and installed as a project unit.
Offshore Wind Operation and Maintenance E4. Cruise, offshore energy and auxiliary/specialised fleets: O&M service operations.
Offshore wind operations and maintenance X42. Offshore Wind Installation and Cable Lay: Lifecycle activities including turbine servicing, cable monitoring, foundation inspection, and component exchange.
Offshore Wind Tower X104. Project Cargo Forwarders and Heavy Transport: Tubular tower for an offshore turbine, often delivered in two or three sections.
OffshorePlan X57. Ocean Energy Beyond Wind: Generic label for offshore marine spatial planning documents in EU member states.
OFS X31. Helicopter Operations on Ships: Obstacle Free Sector.
OFSI X22. Piracy, Maritime Security and Armed Protection: UK Office of Financial Sanctions Implementation, part of HM Treasury.
OFSI (Office of Financial Sanctions Implementation) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: The UK Treasury body, equivalent in function to OFAC, administering UK financial sanctions and the Russia maritime services ban.
OFSI Annual Review X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A UK publication summarizing enforcement and threat-assessment work, with explicit maritime sections since 2022.
OFTO (Offshore Transmission Owner) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: UK regulatory regime separating ownership of offshore transmission assets, including export cables, from generation.
OHBC X169. Container Terminal Cranes, Yard Equipment, and Lashing: Over-Head Bridge Crane, a single-girder or double-girder bridge crane used in workshops and container freight stations.
Ohio class X11. Naval Vessels, Warship Systems and Naval Architecture: USN SSBN-726 Trident submarine, 14 boomers and 4 SSGNs.
Ohio River X33. Inland Navigation and Barge Operations: US navigable river of 981 miles with locks and dams managed by USACE.
Ohio River District X103. US Inland Waterway Towing and Barge: An informal reference to the USACE Lakes and Rivers Division districts that manage the Ohio.
OICEW X21. STCW Certificates, Crewing and Seafarer Welfare: Officer In Charge of an Engineering Watch, STCW III/1 operational level CoC.
OICNW X21. STCW Certificates, Crewing and Seafarer Welfare: Officer In Charge of a Navigational Watch, STCW II/1 operational level CoC.
OICOSE, Officers' International Co-operative for Sailors' Education F3. Seafaring Life, Education, Professions and Institutions: Generic term.
Oil (Cooking) X120. Marine Catering, Provisions and Ship Chandlers: IMPA 550401 sunflower oil, 5 L jerrycan, dry stores standard.
Oil (Reg 1 Annex I) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: Petroleum in any form including crude oil, fuel oil, sludge, oil refuse, and refined products other than petrochemicals which are subject to Annex II.
Oil analysis program X61. Marine Lubricants and Cylinder Oils: Structured sampling and laboratory testing service for monitoring lubricant and equipment health.
Oil and Gas Exclusion Zone (Fishery Impact) X87. Fishing Vessels and Fisheries Management: Area around offshore installations where fishing is prohibited under coastal state rules.
Oil Boom X60. Marine Salvage and Wreck Removal: Floating barrier deployed to contain or deflect oil on the water surface.
Oil Bunker Theft X22. Piracy, Maritime Security and Armed Protection: Siphoning of fuel from vessels, particularly in the Singapore Strait and West Africa.
Oil Companies International Marine Forum X40. Tanker Vetting, SIRE and VIQ: OCIMF, founded in 1970 with headquarters in London, the industry body that issues SIRE, OVID, MEG4, and numerous safety guidance documents.
Oil consumption X61. Marine Lubricants and Cylinder Oils: Quantity of cylinder or system oil used per unit time or per unit fuel burned by an engine.
Oil Content Meter X63. Marine Auxiliary Machinery and Pumps: Sensor measuring ppm oil in OWS discharge water, required by MARPOL Annex I Regulation 14.
Oil discharge monitor X19. Engine Room Watchkeeping and UMS Operations: ODME measuring oil content in tanker washwater discharge per MEPC.108(49).
Oil Discharge Monitoring (ODME) Test X5. Marine Surveying and Inspection: Functional test of MARPOL Annex I monitoring equipment.
Oil Discharge Monitoring Equipment X63. Marine Auxiliary Machinery and Pumps: ODME measuring oil content of slops discharged from cargo tanks of crude oil tankers.
Oil Fuel (Reg 1 Annex I) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: Any oil used as fuel in connection with the propulsion and auxiliary machinery of the ship in which such oil is carried.
Oil fuel arrangements X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: SOLAS II-2/4.2 sets requirements for oil-fuel piping, with flashpoint not less than 60 degrees Celsius.
Oil Major X40. Tanker Vetting, SIRE and VIQ: An informal term for the largest internationally-active oil and gas companies that maintain dedicated vetting departments.
Oil Major Approval X40. Tanker Vetting, SIRE and VIQ: A vetting clearance issued by an oil major, used by owners as a quality reference when marketing tonnage to other charterers.
Oil Major Vetting X1. Cargo Science, Commodities and Cargo Care: SIRE/CDI inspections of tank ships.
Oil Major Vetting Coordination X86. Port Agency, Husbandry and Disbursement: Coordination of oil major vetting inspections such as SIRE.
Oil mist detector X19. Engine Room Watchkeeping and UMS Operations: OMD continuously monitoring crankcase atmosphere, types include Schaller Visatron VN 116/87 and Specronix.
Oil mist detector (OMD) B2. Marine Engineering: Crankcase oil-mist detection per UR M10.
Oil Outflow Analysis X54. Naval Architecture Software and IACS Rules: MARPOL Annex I Regulation 23 calculation supported by NAPA and GHS.
Oil Pollution Act 1990 X108. Marine Insurance and P&I Clubs: The United States OPA-90 statute imposing strict pollution liability on responsible parties for spills in United States waters, with high financial responsibility requirements.
Oil Pollution Act 1990 (OPA 90) X4. Marine Insurance, P&I and Claims: US federal statute imposing strict liability for oil pollution in US waters.
Oil Pollution Act 1990 (OPA 90) (US) X143. Landmark Maritime Law Cases and Doctrines: US statute codified at 33 USC section 2701, enacted following the 1989 Exxon Valdez spill.
Oil Pollution Act 1990 (US) X51. Maritime Arbitration, Law and BIMCO Clauses: The US statute on liability and compensation for oil pollution in US navigable waters.
Oil Pollution Act of 1990 X60. Marine Salvage and Wreck Removal: US legislation enacted after Exxon Valdez establishing salvage and pollution response requirements.
Oil Pollution Casualty X12. Maritime Casualties and Investigation: Spill event reportable under MARPOL Annex I Regulation 37 and the OPRC Convention.
Oil pollution casualty investigation X163. Marine Accident Investigation Agencies and Landmark Inquiries: Investigation thread under MARPOL Annex I addressing source, volume, response, and shoreline impact of oil spills following a marine casualty.
Oil pollution emergency plan (Polar Code) X27. Polar Code, Ice Navigation and Polar Operations: Required by Polar Code under MARPOL Annex I.
Oil Pollution Survey X43. Marine Surveying and Warranty Surveying: An inspection of oil pollution prevention equipment under MARPOL Annex I, including IOPP certification work.
Oil record book C2. Ship operations, crewing and technical management: Part I for machinery and Part II for cargo.
Oil Record Book (ORB) Audit X5. Marine Surveying and Inspection: Review of Parts I and II entries during MARPOL surveys.
Oil Record Book (ORB) Deficiency X146. Port State Control Regimes, MoUs, and Inspection Systems: A 14102 deficiency under MARPOL Annex I for incomplete or false entries, a common detention trigger.
Oil Record Book Part I A3. Marine environmental legislation: MARPOL and its annexes: Machinery space operations on all ships of 400 GT and above.
Oil Record Book Part I (Machinery Space) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: The book required by Annex I Reg 17 on every oil tanker of 150 GT and above and every other ship of 400 GT and above, recording machinery space operations.
Oil Record Book Part II A3. Marine environmental legislation: MARPOL and its annexes: Cargo and ballast operations on oil tankers of 150 GT and above.
Oil Record Book Part II (Cargo and Ballast Operations) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: The book required by Annex I Reg 36 on every oil tanker of 150 GT and above, recording cargo and ballast operations.
Oil Record Book Survey X43. Marine Surveying and Warranty Surveying: A documentary inspection of the Oil Record Book entries against operational records during port state or class attendances.
Oil Recovery Pump X63. Marine Auxiliary Machinery and Pumps: Pump returning separated oil from the OWS oil tank to the sludge tank.
Oil Recovery Tank X167. Major Salvage Companies, Wreck Removals, and Equipment: Onboard or barge mounted tank used to receive product extracted by hot tap from a sunken casualty.
Oil Residue (Sludge) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: Residual waste oil products generated during normal operation, such as those from purification of fuel or lubricating oil, oil separated from oily water, or waste oil from machinery.
Oil Rig Module X104. Project Cargo Forwarders and Heavy Transport: Process or accommodation module fabricated for offshore drilling or production units.
Oil Rig Support X79. Tugs and Towage Industry: Towage and supply services provided to mobile offshore drilling units.
Oil sampling lab X59. Offshore Wind O&M, CTVs and SOVs: Laboratory analyzing turbine gearbox and hydraulic oil samples for wear metals, water, and viscosity.
Oil spill X10. Marine Biology, Fisheries and Oceanography: Accidental release of petroleum into the marine environment.
Oil Spill Contingency Plan D3. Marine environmental science, pollution and conservation: Pre-arranged plan for spill response.
Oil Spill Modeling D3. Marine environmental science, pollution and conservation: Simulation of slick movement and weathering.
Oil Spill Removal Organization (OSRO) X167. Major Salvage Companies, Wreck Removals, and Equipment: US Coast Guard classified contractor providing on water oil spill response, often paired with SMFF salvors.
Oil Spill Response Limited X60. Marine Salvage and Wreck Removal: International Tier 3 OSRO with bases in Southampton, Singapore, Bahrain, and Fort Lauderdale.
Oil Spill Response Organization X60. Marine Salvage and Wreck Removal: Industry contractor providing pollution response services under regulatory or contractual obligations.
Oil Spill Response Organization (OSRO) X99. Marine Salvage Awards and SCOPIC: US Coast Guard-classified organization providing oil spill response, often coordinated with salvage operations.
Oil tank coating X45. Marine Paints, Coatings and Antifouling: Coating in cargo tanks of crude oil tankers, governed by IMO PSPC-COT under Resolution MSC.288(87).
Oil Tanker Advanced X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Regulation V/1-1-2 course for officers with cargo responsibility on oil tankers.
Oil Tanker Basic X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Regulation V/1-1-1 short course for service on oil tankers.
Oil Tanker ESP X142. Classification Societies and Class Notations: Application of Enhanced Survey Programme to crude and product oil tankers.
Oil Tanker Familiarization Course X55. Marine Simulators, Training and Maritime Academies: STCW Regulation V/1-1 basic course in oil tanker cargo and ballast operations.
Oil Water Separator X63. Marine Auxiliary Machinery and Pumps: Equipment removing dispersed oil from bilge water to comply with the 15 ppm MARPOL discharge limit.
Oil Weathering D3. Marine environmental science, pollution and conservation: Processes such as evaporation, emulsification, and dispersion affecting spilled oil.
Oil-based paint X45. Marine Paints, Coatings and Antifouling: Alkyd or natural oil paint used for maintenance and decorative work.
Oil-Fired Auxiliary Boiler X63. Marine Auxiliary Machinery and Pumps: Boiler firing heavy fuel oil or marine diesel oil to generate process and heating steam.
Oil-in-Water Sensor X63. Marine Auxiliary Machinery and Pumps: Optical, scattering, or capacitive sensor used in OWS and ODME equipment.
Oil-lubricated stern tube X38. Propellers, Stern Gear and Shaft Lines: Stern-tube arrangement with white-metal bearings flooded in lubricating oil, sealed by lip or mechanical seals at both ends.
Oil/Bulk/Ore carrier (OBO) B5. Ship Types and Individual Vessels: Combination carrier.
OilCo Marine X72. Bunkering Hubs and Bunker Suppliers: General term for state oil company marine fuel arms such as Saudi Aramco Trading and Pertamina International Shipping.
OilCo terminal X15. Ports, Terminals and Stevedoring: generic term for oil major's leased terminal.
OILED Wildlife Care Network (OWCN) X126. Marine Oil Spill Response and OPRC Regimes: California UC Davis-led network responding to oiled wildlife under state contracts.
Oiler X21. STCW Certificates, Crewing and Seafarer Welfare: Engine room rating performing routine maintenance and watchkeeping under direction.
Oilfield support vessel conversion X125. Superyacht Industry, Builders and Brokers: Source for some explorer yacht refits.
OilMap X60. Marine Salvage and Wreck Removal: RPS oil spill trajectory and fate model used by responders and planners.
Oilon Burner X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Finnish steam atomising burner used on Aalborg and Mission boilers, with annual nozzle and atomiser inspection.
Oilseeds X1. Cargo Science, Commodities and Cargo Care: Soy, rapeseed, sunflower; Group B for some schedules.
Oilskins F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Waterproof outerwear traditionally worn by sailors.
Oilstate X42. Offshore Wind Installation and Cable Lay: Reference subsea connector brand; included for context.
Oiltanking X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: Marquard and Bahls subsidiary operating bunker fuel terminals in Amsterdam, Antwerp, Singapore, and Houston.
OilX X74. AIS Data, Vessel Tracking and Maritime Intelligence: Oil market analytics startup acquired by Vortexa in 2022.
Oily Bilge Water X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: Water that may be contaminated by oil, accumulating in machinery space bilges; discharge regulated under Annex I Reg 15 with the 15 ppm limit.
Oily Mixture (Reg 1 Annex I) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: Any mixture with an oil content; the regulated content threshold for sea discharge under Reg 15 is 15 ppm.
Oily Sludge Disposal X28. Ship Recycling and End-of-Life: Treatment of residual sludge from settling, lubrication, and bunker tanks.
Oily water separator X19. Engine Room Watchkeeping and UMS Operations: OWS, gravity coalescer or membrane unit producing effluent below 15 ppm.
Oily water separator (OWS) B2. Marine Engineering: 15 ppm separator per MEPC.107(49).
Oily Water Separator (OWS) Survey X5. Marine Surveying and Inspection: Annual inspection and operational test of 15 ppm equipment.
Oily Water Separator Decommissioning X50. Ship Recycling, Demolition and Hong Kong Convention: The decontamination and removal of oily water separators before hot work.
Oily Water Separator Operator F3. Seafaring Life, Education, Professions and Institutions: Engine-rating training topic.
Oily Water Separator retrofit B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Compliance upgrade to 15 ppm spec.
OIM X14. Offshore Oil and Gas Marine Operations: Offshore Installation Manager; person in charge on offshore unit.
OISST D1. Physical and chemical oceanography and marine meteorology: NOAA Optimum Interpolation Sea Surface Temperature product.
OK Dinghy F4. Recreational Boating, Yachting and Sport: International single-handed dinghy designed by Knud Olsen.
OK Lim Hin Leong X72. Bunkering Hubs and Bunker Suppliers: Founder of Hin Leong Trading convicted of fraud in 2024 following the 2020 collapse of the Singapore fuel oil supplier.
OK-650 Reactor X91. Submarines and Submarine Cable Systems: Russian naval pressurized water reactor used in several modern submarine classes.
Okta X107. Maritime Cybersecurity and OT Security: Cloud identity provider offering single sign-on and lifecycle management.
Olau Salvage X157. Marine Loss Adjusters, GA Practice, and Casualty Firms: Historic North Sea salvage operator.
Olbia X85. Ferries, Ro-Pax Operators and Routes: Sardinian northeastern port hosting Moby Lines, Tirrenia, Grimaldi Lines, and Corsica Ferries services.
Old City Harbour Tallinn X164. Cruise Industry, Brands, Ship Classes, and Terminals: The principal Tallinn cruise berth on the Estonian capital's waterfront, operated by the Port of Tallinn.
Old ice X27. Polar Code, Ice Navigation and Polar Operations: Sea ice that has survived at least one summer melt; includes second-year and multi-year ice.
Old Ironsides F1. Maritime History: Nickname of USS Constitution, launched 1797.
Old Salt F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Folkloric term for an experienced seafarer.
Olde North X42. Offshore Wind Installation and Cable Lay: Reference legacy UK round zone naming convention.
Olefin content X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Unsaturated hydrocarbons in fuel, contributing to instability.
Olen (Russian icebreaker) X27. Polar Code, Ice Navigation and Polar Operations: Historic Russian icebreaker; example of early NSR support.
Oleochemicals X135. Chemical Tanker Operators and IBC Code Cargoes: Palm, coconut and tallow-derived fatty acids, fatty alcohols, methyl esters and glycerin shipped from Southeast Asia to North America and Europe on stainless tankers.
Oleophilic Skimmer X126. Marine Oil Spill Response and OPRC Regimes: Skimmer relying on the affinity of oil for a hydrophobic surface, rather than weir or vortex principles.
Olesinski Limited X35. Yacht and Superyacht Industry: UK naval architecture studio long associated with Sunseeker and Princess.
Olifants River X124. Dredging Industry and Reclamation Contractors: South African estuary dredging.
Olive ridley turtle X10. Marine Biology, Fisheries and Oceanography: *Lepidochelys olivacea*, sea turtle famous for mass nesting (arribadas).
Oliver Hazard Perry class X11. Naval Vessels, Warship Systems and Naval Architecture: USN FFG-7 frigate, retired from USN in 2015.
Olmsted Locks and Dam X103. US Inland Waterway Towing and Barge: A modern Ohio River navigation structure that replaced Locks 52 and 53 near the mouth of the Ohio.
Olso Express Agency X86. Port Agency, Husbandry and Disbursement: Agency arrangement supporting the Olso Express vessel service.
Olympia FPSO X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: SBM FPSO under construction for the ExxonMobil Whiptail development offshore Guyana.
Olympia, USS F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Spanish-American War cruiser preserved in Philadelphia.
Olympic X45. Marine Paints, Coatings and Antifouling: Hempel SPC antifouling family for long-haul vessels.
Olympic Bull X59. Offshore Wind O&M, CTVs and SOVs: Olympic Shipping SOV supporting North Sea wind farm operations.