Glossary

Maritime glossary, terms beginning with P (page 11)

All maritime glossary terms that begin with the letter P, drawn from every subject section. 2685 entries.

Showing 185 of 2685 terms (page 11 of 11).

PSA Singapore Terminals X46. Container Terminal Operations: The Singapore container terminals at Tuas, Pasir Panjang, Brani, and Keppel operated by PSA.
PSC X7. Flag State, Port State Control and Detention Vocabulary: Port State Control.
PSC (Port State Control) X16. Nautical Science, Navigation and COLREGs: Inspection of foreign ships in national ports.
PSC Annual Report X66. Port State Control and Regional MOUs: Each MOU publishes statistics on inspections, detentions, and flag performance.
PSC Detention X5. Marine Surveying and Inspection: Formal detention by port state pending rectification of deficiencies.
PSC Information System X66. Port State Control and Regional MOUs: Regional database used to record and share inspection data.
PSC inspection (BW and AFS) X18. Ballast Water, Biofouling and Antifouling: Port state control verification of certificates, plans, records, and BWMS operation.
PSC Inspection Coordination X86. Port Agency, Husbandry and Disbursement: Coordination of Port State Control inspections during the port stay.
PSC NOx Inspection X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: A port State Control inspection focused on verifying NOx emission compliance using the EIAPP Certificate, Technical File, and Engine Record Book.
PSC Surveyor X43. Marine Surveying and Warranty Surveying: A port state control officer employed by a maritime authority to inspect foreign-flag vessels under regional memoranda.
PSC Targeting Factor X66. Port State Control and Regional MOUs: Composite score in Tokyo MOU based on ship type, age, flag, RO, and company.
PSC, Polar X52. Polar Code, Arctic and Antarctic Shipping: Polar Ship Certificate, distinct from Port State Control PSC.
Pscav Scavenge Air Pressure X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Charge air pressure at the scavenge receiver, used with turbocharger speed to assess compressor performance.
PSCO A7. Compliance, certification and enforcement: Port State Control Officer.
PSCO Code of Good Practice X146. Port State Control Regimes, MoUs, and Inspection Systems: See Code of Good Practice.
PSCRB X21. STCW Certificates, Crewing and Seafarer Welfare: Proficiency in Survival Craft and Rescue Boats short course.
PSCRB (Proficiency in Survival Craft and Rescue Boats) X160. Maritime Academies, Universities, and STCW Certification: STCW A-VI/2 paragraph 1 endorsement for crew assigned launch and operation of survival craft and non-fast rescue boats.
PSI (Pre-Shipment Inspection) X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: A cargo-side inspection that on chemical and clean-product trades runs in parallel with vetting.
PSMSL D2. Hydrography, tides, waves, bathymetry and marine geology: Permanent Service for Mean Sea Level archive of tide gauge data.
PSN X75. IMDG Code, Classes, Packing and Segregation: See Proper Shipping Name.
PSP-CV X127. Maritime Security, Anti-Piracy and PMSCs: Port Security Plan Cape Verde example used in Yaounde implementation.
PSPC X8. IACS, Class Rules and Class Notations: Performance Standard for Protective Coatings adopted by IMO resolution MSC.215(82).
PSPC ballast tank X165. Marine Coatings, Antifouling, and Hull Husbandry: Dedicated seawater ballast tank standard requiring two-coat epoxy of NDFT 320 micrometers and a 15-year target useful life.
PSPC Edge Treatment X88. Marine Surface Preparation and Coatings Application: Requirement under MSC.215(82) for sharp edges to be ground to a minimum 2 mm radius, three-pass power tool treated, or equivalent before coating.
PSPC Stripe Coat X88. Marine Surface Preparation and Coatings Application: First stripe coat applied to edges, weld seams, and complex areas by brush followed by a second stripe coat in shop or block stage per PSPC.
PSPC-COT X45. Marine Paints, Coatings and Antifouling: IMO Performance Standard for Protective Coatings for cargo oil tanks of crude oil tankers, Resolution MSC.288(87).
PSPC-WBT X8. IACS, Class Rules and Class Notations: PSPC for water ballast tanks under MSC.215(82).
PSS X6. Container, Intermodal and Trade Codes: Peak Season Surcharge, seasonal uplift on transpacific and other peak-demand trades.
PSSA (Particularly Sensitive Sea Area) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: An area designated by IMO needing special protection through action by IMO because of its significance for ecological, socio-economic, or scientific reasons.
PSSC X164. Cruise Industry, Brands, Ship Classes, and Terminals: The Passenger Ship Safety Certificate issued under SOLAS Chapter I attesting to a cruise ship's compliance with construction, machinery, and safety equipment standards.
PSSR X21. STCW Certificates, Crewing and Seafarer Welfare: Personal Safety and Social Responsibilities short course.
PSSR Personal Safety and Social Responsibilities X55. Marine Simulators, Training and Maritime Academies: STCW Regulation VI/1 element addressing onboard safety culture, communication, and emergency procedures.
PST X21. STCW Certificates, Crewing and Seafarer Welfare: Personal Survival Techniques short course.
PST Personal Survival Techniques X55. Marine Simulators, Training and Maritime Academies: STCW Regulation VI/1 element covering life jackets, immersion suits, and survival craft drills.
PSU Redundancy X109. Maritime Autonomous Surface Ships and MASS Code: The provision of dual power supplies to autonomy compute nodes to maintain availability under single failure.
PSV X14. Offshore Oil and Gas Marine Operations: Platform supply vessel; cargo deck plus mud/brine/methanol tanks.
PSV (Platform Supply Vessel) E4. Cruise, offshore energy and auxiliary/specialised fleets: Offshore vessel resupplying platforms/rigs.
PSW X76. Stevedoring, Lashing and Cargo Securing: Permissible Stacking Weight on the CSC plate, sometimes shown as the allowable stacking weight for the container.
PT Pertamina Trans Kontinental Bunker X72. Bunkering Hubs and Bunker Suppliers: Bunker tanker operating subsidiary of Pertamina serving Indonesian ports.
Pt-100 RTD X20. LNG Operations and Custody Transfer: Platinum resistance temperature detector, primary cryogenic temperature sensor; class-approved per GIIGNL.
Pt/Ti Anode X100. Marine Cathodic Protection and Anodes: A platinized-titanium ICCP anode, often supplied in pencil or disc form.
PTC Ring Crane X60. Marine Salvage and Wreck Removal: Mammoet Platform Twin Ring crane series enabling very high capacity lifts.
Pteropod X10. Marine Biology, Fisheries and Oceanography: Pelagic gastropod, aragonite-shelled species highly sensitive to acidification.
PTH X19. Engine Room Watchkeeping and UMS Operations: Power take home, propeller drive by shaft generator motor mode in dead engine condition.
PTI X19. Engine Room Watchkeeping and UMS Operations: Power take in, electric motor assist to shaft propulsion.
PTI (Pre-Trip Inspection) X26. Reefer Containers and Cold Chain Logistics: Standardized depot-side functional test of reefer unit prior to release.
PTI Procedure X83. ISO Container Manufacturing and Leasing: Reefer pre-trip inspection procedure setting out diagnostic steps and acceptance criteria.
PTO X19. Engine Room Watchkeeping and UMS Operations: Power take off, shaft generator operation drawing power from the propeller shaft.
PTS (port-to-ship) bunkering X149. Marine Fuels, Bunkering, and Alternative Fuels: LNG bunkering by pipeline directly from a shoreside terminal to the ship.
Pub 102 X16. Nautical Science, Navigation and COLREGs: NGA International Code of Signals.
Pub 117 X16. Nautical Science, Navigation and COLREGs: NGA Radio Navigational Aids.
Pub 1310 X16. Nautical Science, Navigation and COLREGs: NGA Radar Navigation and Maneuvering Board Manual.
Pub 150 X16. Nautical Science, Navigation and COLREGs: NGA World Port Index.
Pub 151 X16. Nautical Science, Navigation and COLREGs: NGA Distances Between Ports.
Pub 217 X16. Nautical Science, Navigation and COLREGs: NGA Maneuvering Board Manual.
Pub 9 X16. Nautical Science, Navigation and COLREGs: Bowditch, The American Practical Navigator.
Public Equity Raise X49. Ship Finance, Leasing and Maritime Capital Markets: Issuance of common shares by a listed shipping company.
Public Health Alert X41. Cruise Ship Public Health and VSP/USPH: Notice issued by the CDC or port authority to warn cruise operators of an emerging health risk.
Public Health Hazard X75. IMDG Code, Classes, Packing and Segregation: Considered for Category A infectious substances under Class 6.2.
Public hearing X163. Marine Accident Investigation Agencies and Landmark Inquiries: Procedure used by some investigation bodies (notably the NTSB and USCG Marine Boards) to take evidence in public.
Public Key Infrastructure X48. Maritime Cybersecurity: Hierarchical system supporting issuance and validation of digital certificates.
Public policy X152. Maritime Arbitration and Dispute Resolution: Limited ground for refusing recognition or enforcement under Article V(2)(b) NYC, narrowly construed in pro-enforcement jurisdictions.
Public service obligation C4. Ports, terminals and coastal/marine civil engineering: PSO for ports and inland transport.
Publication 117 X73. Marine Hydrography, Charting and ENC: NGA Pub. 117 Radio Navigational Aids, the US counterpart of ALRS Volumes 1-2.
Puerto Rico Trench X10. Marine Biology, Fisheries and Oceanography: Deep ocean trench of the Atlantic, north of Puerto Rico.
Puffer fish X10. Marine Biology, Fisheries and Oceanography: Tetraodontid fish capable of inflating; some contain tetrodotoxin.
Puffin X10. Marine Biology, Fisheries and Oceanography: Diving seabird of the genus *Fratercula*, family Alcidae.
Pugachev Pipeline Incident X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Pipeline integrity incident referenced in regulator training.
Puget Sound Bunker Service X72. Bunkering Hubs and Bunker Suppliers: Bunker supply at Seattle and Tacoma by Crowley Marine, Harley Marine, and Petrogas.
Puget Sound Pilots X32. Marine Pilotage and Pilot Operations: Washington state pilots' association covering Puget Sound and approaches.
Pull Test X13. Marine Salvage and Wreck Removal: Bollard pull trial to confirm salvage tug capability for a refloat plan.
Pull up alarm X19. Engine Room Watchkeeping and UMS Operations: ECR notification when alarm count or load exceeds normal range.
Pull-down time X26. Reefer Containers and Cold Chain Logistics: Duration from start-up to reaching set point with cargo or empty.
Pull-in X14. Offshore Oil and Gas Marine Operations: Operation pulling a flowline or umbilical into a platform J-tube.
Pull-in winch X42. Offshore Wind Installation and Cable Lay: Heavy duty winch on a substation or foundation pulling the array or export cable into the J-tube.
Pull-Off Adhesion X88. Marine Surface Preparation and Coatings Application: Tensile force per unit area required to detach a dolly bonded to a coating, measured per ASTM D4541 or ISO 4624.
Pull-off adhesion test X45. Marine Paints, Coatings and Antifouling: Adhesion measurement using a dolly bonded to the coating and pulled perpendicular to the substrate.
Pull-Test Wire X141. Marine Salvage Industry and Wreck Removal Contractors: Calibrated towing wire used to assess maximum pull a grounded hull can sustain.
Pull-Through Lashing X9. Cargo Securing, Lashing and Stability Vocabulary: Lashing passing through cargo and anchored both sides.
Pull-up length (keyless fit) X38. Propellers, Stern Gear and Shaft Lines: Axial pull-up of the propeller onto its cone needed to develop the design interference per the maker.
Pulling Force Calculation X104. Project Cargo Forwarders and Heavy Transport: Calculation of tractive force required for an SPMT or ballast tractor combination.
Pulp Probe Reefer X136. Reefer Vessels and Cool Chain Operators: Temperature sensing probe inserted into produce pulp to monitor cargo temperature inside a reefer container, often required for USDA cold treatment.
Pulp temperature X26. Reefer Containers and Cold Chain Logistics: Temperature measured inside fruit or muscle, critical compliance metric for cold treatment.
Pulp, Wood X1. Cargo Science, Commodities and Cargo Care: Pressed bales; absorbent and prone to wet damage.
Pulpwood terminal X15. Ports, Terminals and Stevedoring: bulk facility specialized in wood chips and pulp.
PULS X54. Naval Architecture Software and IACS Rules: Panel Ultimate Limit State buckling code from DNV referenced in CSR-BC+OT direct strength analysis.
Pulse Disinfection X41. Cruise Ship Public Health and VSP/USPH: Periodic increase in halogen dose to address transient contamination events in recreational water.
Pulse Jet X61. Marine Lubricants and Cylinder Oils: Hans Jensen injector technology delivering atomized cylinder oil pulses into the combustion chamber.
Pulse Jet Cleaning X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Boiler tube cleaning technique using compressed air or steam pulses to dislodge soot from fire-side surfaces.
Pulse oximeter X36. Shipboard Medical, Telemedicine and Seafarer Health: Battery-operated SpO2 measurement device.
Pulse Trawl X87. Fishing Vessels and Fisheries Management: Beam trawl using pulsed electric current to stimulate flatfish; banned in EU waters from 1 July 2021 under Regulation 2019/1241.
Pulse Tug X79. Tugs and Towage Industry: Damen branding for fully electric harbor tug variants.
Pulse turbocharging X19. Engine Room Watchkeeping and UMS Operations: Exhaust system with narrow pipes preserving pulse energy to the turbocharger.
Pulse Width Modulation X67. Marine Electrical Systems and Shore Power: Switching technique used by marine inverters to synthesize an AC waveform from a DC bus.
Pulsed turbine (OTEC) X57. Ocean Energy Beyond Wind: Concept of using intermittent high-flow turbines in open-cycle OTEC plants.
PUMA X124. Dredging Industry and Reclamation Contractors: Boskalis-Van Oord joint venture executing Maasvlakte 2.
Puma Energy X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: Trafigura-controlled downstream group supplying bunkers at Cristobal, Balboa, San Juan, and West African ports.
Pump Dale X39. Pre-1900 Maritime History: A trough conducting water from the chain pumps overboard.
Pump element X61. Marine Lubricants and Cylinder Oils: Internal cylinder lubricator component that meters oil per stroke to a quill.
Pump out X3. Ship Handling, Seamanship and Deck Vocabulary: Discharge bilge or ballast water.
Pump Recovery X50. Ship Recycling, Demolition and Hong Kong Convention: The salvage of ballast, cargo, and engine room pumps for resale as reconditioned units.
Pump room X15. Ports, Terminals and Stevedoring: tanker compartment housing cargo pumps.
Pump room block X58. Shipbuilding Yards and Construction: Tanker block containing cargo and ballast pump room, heavily preoutfitted.
Pump Room Bottom Protection (Reg 22 Annex I) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: The requirement on oil tankers of 5,000 DWT and above with a pump room, to provide a double bottom protection of the pump room, for ships delivered on or after 1 January 2007.
Pump Room Inspection X40. Tanker Vetting, SIRE and VIQ: The dedicated walk-through of the cargo pump room conducted during VIQ Chapter 8 and Chapter 5 review.
Pump Room Survey X43. Marine Surveying and Warranty Surveying: A safety and condition inspection of tanker pump rooms covering ventilation, gas detection, and lighting integrity.
Pump Room Ventilation Test X40. Tanker Vetting, SIRE and VIQ: A safety-critical ventilation system test recorded and reviewed under VIQ Chapter 8.
Pump stack X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Vertical arrangement of transfer pumps on a bunker barge.
Pump Tower X20. LNG Operations and Custody Transfer: Stainless steel truss structure inside membrane and SPB tanks supporting cargo pumps and instruments.
Pump Tower Base Support (PTBS) X20. LNG Operations and Custody Transfer: Reinforced support for the pump tower foot designed for cyclic sloshing loads.
Pump Trip X20. LNG Operations and Custody Transfer: Automatic stop on low NPSH, motor overcurrent, or ESD activation.
Pump-ashore X124. Dredging Industry and Reclamation Contractors: Discharge mode in which TSHD moors and pumps cargo through shore pipeline.
Pump-room ventilation (tankers) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: SOLAS II-2/4.5.4 requires mechanical ventilation with at least 20 air changes per hour.
Pumpability X1. Cargo Science, Commodities and Cargo Care: Cargo property reflecting viscosity at handling temperature.
Pumpable Liquid X75. IMDG Code, Classes, Packing and Segregation: Property considered when assigning portable tank instructions to viscous liquids.
Pumping Equipment X13. Marine Salvage and Wreck Removal: Submersible, hydraulic, and Wellpoint pumps for dewatering casualties.
Pumping Plan X60. Marine Salvage and Wreck Removal: Engineered sequence of dewatering pumps and discharge routes to restore buoyancy.
Pumping, Piping and Discharge Arrangements (Reg 30 Annex I) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: The detailed arrangement requirements for oil tankers including manifolds, line stripping systems, and small diameter lines.
Pumpman Survey X43. Marine Surveying and Warranty Surveying: A practical inspection associated with cargo pumping performance and competence on tankers, sometimes part of charterer vetting.
Punch list X59. Offshore Wind O&M, CTVs and SOVs: Outstanding items recorded at commissioning handover and worked off during the warranty period.
Punic Wars F1. Maritime History: Three Roman-Carthaginian conflicts, central to ancient naval history.
Punic Wreck of Marsala F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Phoenician warship excavated by Honor Frost.
Punitive Damages X114. Maritime Arbitration and Shipping Law Firms: Available in limited circumstances under United States general maritime law but not under English law.
Punta Arenas X64. Cruise Industry Operators, Brands and Ships: Chilean port serving Patagonia and Antarctic itineraries.
Punta Catalina X124. Dredging Industry and Reclamation Contractors: Dominican Republic terminal dredging.
Puntland Maritime Police Force X127. Maritime Security, Anti-Piracy and PMSCs: Somali regional counter-piracy land force established 2010 with UAE support.
Purchase X3. Ship Handling, Seamanship and Deck Vocabulary: Mechanical advantage from a tackle.
Purchase Price X29. Ship Sale and Purchase, Management Contracts and Valuation: NSF 2012 Clause 1 stated consideration for the vessel.
Purdue Model X25. Maritime Cybersecurity, OT and IT: Reference architecture defining Levels 0 to 5 for ICS network segmentation.
Pure car and truck carrier C3. Logistics, freight forwarding and multimodal trade: PCTC vessel.
Pure Car Carrier X85. Ferries, Ro-Pax Operators and Routes: Vehicle-only specialized ro-ro vessel distinct from passenger-carrying ro-pax.
Pure Epoxy X88. Marine Surface Preparation and Coatings Application: Epoxy coating without coal tar modification used as a non-PAH alternative for tanks, holds, and immersed surfaces.
Pure Salvage X99. Marine Salvage Awards and SCOPIC: Salvage services rendered without contract, giving rise to a reward under general maritime law.
Pure Tanker Operator X44. Shipping Indices, FFAs and Freight Markets: Owner whose fleet consists exclusively of tanker tonnage and whose hedging activity concentrates in TD and TC route FFAs.
Pure Tug-Pilotage X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Maneuver in which the pilot directs assist tugs without the vessel's main engines, used at confined berths.
PureBallast (Alfa Laval) X18. Ballast Water, Biofouling and Antifouling: Industry-leading UV BWMS line, latest version PureBallast 3.2.
PureNOx Prime X69. EGCS Scrubbers, SCR and Marine Air Emissions: Compact washwater cleaning unit from Alfa Laval for closed-loop bleed-off.
PureSOx X69. EGCS Scrubbers, SCR and Marine Air Emissions: Alfa Laval scrubber product line covering open-loop, closed-loop and hybrid configurations.
PureSOx (Alfa Laval) B2. Marine Engineering: Open/closed-loop exhaust gas scrubber.
Purging X20. LNG Operations and Custody Transfer: Sequential N2 displacement of CH4 from inerted piping prior to opening for maintenance.
Purifier X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Centrifuge with water seal removing free water and solids from fuel oil.
PurpleTRAC X74. AIS Data, Vessel Tracking and Maritime Intelligence: Pole Star Global compliance screening platform integrating sanctions, ownership and AIS data.
Purse Davit X87. Fishing Vessels and Fisheries Management: Lifting arm used in tuna purse seine operations to handle the purse line and rings.
Purse Line X87. Fishing Vessels and Fisheries Management: Wire or rope passing through rings at the bottom of a purse seine, drawn to close the net.
Purse Seine D4. Fisheries, aquaculture, blue economy and marine resources: Encircling net closed at the bottom by a draw line.
Purse Seiner X87. Fishing Vessels and Fisheries Management: Vessel rigged to deploy and recover a purse seine, including small coastal and large tuna super-seiners.
Purser X24. Cruise, Passenger Ship and Ferry Operations: Senior officer responsible for guest accounts and immigration paperwork.
Pursuit Race F4. Recreational Boating, Yachting and Sport: Race format with staggered starts to finish together.
Purvi Ship Breaking X118. Ship Recycling Yards, Beaches and Regulation: Alang plot operator on the GMB register; HKC SoC status to be confirmed with the issuing classification society.
Purvis Marine X137. Harbour Tugs, Towage Operators and Tug Builders: Sault Ste. Marie based Great Lakes tug operator.
Pusan National University Department of Naval Architecture and Ocean Engineering X121. Maritime Education, Academies and Universities: South Korean naval architecture leader alongside KMOU.
Push Boat X103. US Inland Waterway Towing and Barge: See Pushboat.
Push button starter X19. Engine Room Watchkeeping and UMS Operations: Local pushbutton initiating motor start through MCC.
Push Knee X30. Tug Operations and Harbour Towage: Reinforced vertical pad on the forward end of a push boat for engaging the barge.
Push Knees X103. US Inland Waterway Towing and Barge: See Knees.
Push Tug X30. Tug Operations and Harbour Towage: Tug designed to push barges, particularly on inland waterways.
Push-broom Lidar X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Topobathy lidar configuration projecting a fixed line of laser shots, typical of certain hydrographic airborne sensors.
Push-pull tug X15. Ports, Terminals and Stevedoring: tug operated in pure push or pull configuration.
Push-tow X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The standard formation of a pusher boat with one or more barges rigidly coupled ahead, used on the Rhine, Danube, Volga, and US inland rivers.
Pushboat X103. US Inland Waterway Towing and Barge: A US inland towing vessel with a square stern, raked bow, push knees and twin or more screws designed to push tows of barges.
Pusher X33. Inland Navigation and Barge Operations: Inland tug designed to push barges via square coupling face.
Pusher Towboat X30. Tug Operations and Harbour Towage: Common US inland river vessel pushing strings of barges.
Pusher tug X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: A purpose-built vessel with a square push bow and vertical knees designed to push barges from astern.
Pusnes X79. Tugs and Towage Industry: Norwegian deck machinery and mooring equipment manufacturer now part of MacGregor.
Puyallup X85. Ferries, Ro-Pax Operators and Routes: Washington State Ferries Jumbo Mark II class ro-pax built 1999.
PV Valve X63. Marine Auxiliary Machinery and Pumps: Pressure-vacuum valve fitted on cargo, slop, and fuel tank vent lines.
PVDF Sensor X96. Hull Integrity Monitoring and Strain Gauges: Sensor using polyvinylidene fluoride piezoelectric film for dynamic strain and pressure measurement.
PVHO-1 X82. Saturation Diving and Offshore Diving Operations: ASME Safety Standard for Pressure Vessels for Human Occupancy.
PWC (Personal Watercraft) X35. Yacht and Superyacht Industry: Jet-propelled stand-up or sit-down craft used as superyacht toys.
PWOM X52. Polar Code, Arctic and Antarctic Shipping: Polar Water Operational Manual required under Polar Code Part I-A Chapter 2 providing operators with information on ship capabilities and limitations.
PWR2 X91. Submarines and Submarine Cable Systems: Rolls-Royce Submarines pressurized water reactor used on Astute-class and Vanguard-class submarines.
PWR3 X91. Submarines and Submarine Cable Systems: Rolls-Royce Submarines next-generation pressurized water reactor planned for SSN-AUKUS.
PYC 2025 X125. Superyacht Industry, Builders and Brokers: Updated edition of the Passenger Yacht Code by Lloyd's Register.
Pycnocline D1. Physical and chemical oceanography and marine meteorology: Vertical layer with rapid density change.
Pyotr Velikiy X106. Naval Surface Combatants: Russian Navy Kirov-class nuclear-powered guided-missile cruiser, fourth of class commissioned 1998.
Pyramid Stowage X9. Cargo Securing, Lashing and Stability Vocabulary: Stacking pattern with decreasing tiers; common for pipes.
Pyrethrum Clause X51. Maritime Arbitration, Law and BIMCO Clauses: A bulk cargo charterparty exclusion of certain hazardous cargoes, illustrative of the wider category of excluded cargo clauses.
Pyroboom X126. Marine Oil Spill Response and OPRC Regimes: Refractory fire boom by Applied Fabric Technologies and American Marine (Elastec) with ceramic blanket between stainless steel skin layers.
Pyrolysis oil X47. Marine Fuel Quality and ISO 8217: Liquid product of biomass thermal decomposition, an emerging blendstock for bio-VLSFO.
Pyrometer X63. Marine Auxiliary Machinery and Pumps: Temperature instrument used to monitor flue gas temperatures in auxiliary boilers.
Pyrophoric Liquid Organic NOS X75. IMDG Code, Classes, Packing and Segregation: UN 2845, Class 4.2 Packing Group I.
Pyrophoric Solid Inorganic NOS X75. IMDG Code, Classes, Packing and Segregation: UN 3200, Class 4.2 Packing Group I.
Pyrotechnic Signal X80. Maritime Search and Rescue Coordination: Distress flare governed by SOLAS Chapter III and LSA Code.
Pyxis Ocean X34. Decarbonization, Alternative Fuels and Carbon Pricing: Cargill chartered bulk carrier retrofitted with BAR Technologies WindWings (2023).
PZX triangle X16. Nautical Science, Navigation and COLREGs: Astronomical triangle on the celestial sphere.