Glossary

Maritime glossary, terms beginning with Z

All maritime glossary terms that begin with the letter Z, drawn from every subject section. 521 entries.

Showing 250 of 521 terms (page 1 of 3).

1981 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Comprehensive amendments to Chapter II-1 and II-2, in force 1 September 1984.
1983 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Introduced ISPS-style precursor and revised LSA, in force 1 July 1986.
1988 GMDSS amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Replaced Chapter IV, in force 1 February 1992 (phased to 1 February 1999).
1988 SOLAS Protocol (HSSC) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Harmonized System of Survey and Certification, in force 3 February 2000.
1994 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Added Chapters IX (ISM), X (HSC), and XI (Special Measures), in force 1 July 1998.
2000 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: New HSC Code 2000, FSS Code, LSA Code revisions, in force 1 July 2002.
2002 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Added Chapter XI-2 (ISPS) post-9/11, in force 1 July 2004.
2004 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: ESP Code and bulk carrier safety package, in force 1 July 2006.
2006 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: LRIT (Chapter V), in force 1 January 2008.
2008 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Probabilistic damage stability (Chapter II-1 Part B-1), in force 1 January 2009.
2010 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Goal-based standards under II-1/3-10, IS Code 2008, in force 1 January 2012 and 1 July 2010 respectively.
2012 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Lifeboat release mechanisms (MSC.317(89)), Polar Code preparation.
2014 amendments X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: VGM, RO Code, enclosed-space drills, in force 1 July 2016 / 1 January 2015.
2014 Polar Code adoption X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: MSC.385(94), in force 1 January 2017 (added Chapter XIV).
2017 amendments (MSC.421(98)) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Harmonized damage stability, in force 1 January 2020.
2022 amendments (MSC.521(106)) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Industrial Personnel Code and Chapter XV, in force 1 July 2024.
20FR / 22P1 X6. Container, Intermodal and Trade Codes: 20 ft flatrack with fixed ends.
20FR collapsible / 22P3 X6. Container, Intermodal and Trade Codes: 20 ft flatrack with collapsible ends.
20GP / 22G1 X6. Container, Intermodal and Trade Codes: 20 ft general-purpose dry container, 8 ft 6 in high.
20OT / 22U1 X6. Container, Intermodal and Trade Codes: 20 ft open-top container with removable tarpaulin.
20PL / 22P0 X6. Container, Intermodal and Trade Codes: 20 ft platform (plain) container.
20RF / 22R1 X6. Container, Intermodal and Trade Codes: 20 ft integral reefer container.
22BU / 22B1 X6. Container, Intermodal and Trade Codes: 20 ft bulk container with top loading hatches and bottom discharge.
22HR X6. Container, Intermodal and Trade Codes: 20 ft refrigerated container with external machinery (port-hole / Conair type), legacy.
22PL X6. Container, Intermodal and Trade Codes: 20 ft platform without ends or sides.
22RT X6. Container, Intermodal and Trade Codes: 20 ft reefer tank container.
22SN X6. Container, Intermodal and Trade Codes: 20 ft named-cargo container, e.g., livestock or auto carrier per ISO 6346.
22T0 X6. Container, Intermodal and Trade Codes: 20 ft tank container, non-dangerous liquids, minimum pressure.
22T1 X6. Container, Intermodal and Trade Codes: 20 ft tank, non-dangerous liquids, 1.5 bar minimum.
22T2 X6. Container, Intermodal and Trade Codes: 20 ft tank, non-dangerous liquids, 2.65 bar minimum.
22T3 X6. Container, Intermodal and Trade Codes: 20 ft tank, dangerous liquids, 1.5 bar minimum.
22T4 X6. Container, Intermodal and Trade Codes: 20 ft tank, dangerous liquids, 2.65 bar minimum.
22T5 X6. Container, Intermodal and Trade Codes: 20 ft tank, dangerous liquids, 4 bar minimum.
22T6 X6. Container, Intermodal and Trade Codes: 20 ft tank, dangerous liquids, 6 bar minimum.
22T7 X6. Container, Intermodal and Trade Codes: 20 ft tank, gases, 9.1 bar minimum.
22T8 X6. Container, Intermodal and Trade Codes: 20 ft tank, gases, 22 bar minimum.
22T9 X6. Container, Intermodal and Trade Codes: 20 ft tank, gases, minimum pressure as per design specification.
22U1 X6. Container, Intermodal and Trade Codes: 20 ft open-top with removable top members and tarpaulin.
22VH X6. Container, Intermodal and Trade Codes: 20 ft ventilated container with passive vents.
3rd Generation Semisubmersible X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Semisubmersibles built in the late 1970s and 1980s for up to about 1,500 foot water depth.
40-foot high-cube reefer X70. Reefer Containers and Cold Chain Shipping: Predominant ocean reefer container, 12.19 meters long and approximately 2.90 meters external height, used across most deep-sea perishable trades.
40-foot standard reefer X70. Reefer Containers and Cold Chain Shipping: 40-foot reefer container with standard external height of approximately 2.59 meters, less common than the high-cube variant in modern fleets.
40FR / 42P1 X6. Container, Intermodal and Trade Codes: 40 ft flatrack.
40GP / 42G1 X6. Container, Intermodal and Trade Codes: 40 ft general-purpose dry container, 8 ft 6 in high.
40HC / 45G1 X6. Container, Intermodal and Trade Codes: 40 ft high-cube dry container, 9 ft 6 in high.
40OT / 42U1 X6. Container, Intermodal and Trade Codes: 40 ft open-top container.
40RF / 42R1 X6. Container, Intermodal and Trade Codes: 40 ft integral reefer container, 8 ft 6 in high.
40RH / 45R1 X6. Container, Intermodal and Trade Codes: 40 ft high-cube integral reefer.
45-foot reefer X70. Reefer Containers and Cold Chain Shipping: Reefer container with nominal length of 13.72 meters, used in selected intermodal services where road regulations permit.
45G1 X6. Container, Intermodal and Trade Codes: ISO 6346 size-type code for 40 ft high-cube dry container.
45HC / L5G1 X6. Container, Intermodal and Trade Codes: 45 ft high-cube dry container.
4th Generation Semisubmersible X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Semisubmersibles built in the mid-1980s through 1990s for up to about 3,000 foot water depth.
5th Generation Semisubmersible X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: 1998 to 2004 deepwater semisubmersibles such as Deepwater Nautilus and Eirik Raude.
6th Generation Drillship X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Dual derrick, DP3, ultra-deepwater drillships such as the Discoverer Inspiration series.
6th Generation Semisubmersible X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: 2005 to 2011 ultra-deepwater semisubmersibles with DP3 station keeping.
7th Generation Drillship X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Drillships with enhanced hookload, dual BOPs, and ratings to 12,000 foot water depth or greater.
7th Generation Semisubmersible X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Latest semisubmersibles with dual BOPs, 20,000 psi BOP capability options, and enhanced variable loads.
Z Direction Steel X92. Marine Steel Suppliers and Shipbuilding Plate: Plate steel qualified for through thickness tensile properties to resist lamellar tearing at welded nodes.
Z Drive Tug X167. Major Salvage Companies, Wreck Removals, and Equipment: Azimuth drive harbor tug commonly used in escort and salvage support.
Z factor (CII) X34. Decarbonization, Alternative Fuels and Carbon Pricing: Annual reduction factor tightening the required CII versus the 2019 reference under MEPC.338(76).
Z Performance Level X75. IMDG Code, Classes, Packing and Segregation: UN packaging marking indicating suitability for Packing Group III only.
Z Reduction Factor X112. IMO GHG Strategy, CII, EEXI and EU Maritime Regulation: Annual percentage cut applied to the CII Reference Line, set at 5 percent in 2023 and increasing to 11 percent in 2026.
Z section modulus X162. Naval Architecture, Stability, Resistance, and Structural Design: See Hull girder section modulus Z.
Z Test (Z 10.4) X5. Marine Surveying and Inspection: IACS Recommendation 76 reference Z survey programme for bulk carriers.
Z-9C X11. Naval Vessels, Warship Systems and Naval Architecture: PLAN ASW helicopter derivative of AS 365 Dauphin.
Z-axis Stabilization X68. Maritime Satcom and Telecommunications: Vertical-axis stabilization component within a three-axis stabilized maritime antenna pedestal.
Z-Boat F4. Recreational Boating, Yachting and Sport: Lake-class IYRU keelboat designed by Sven Salen in 1939.
Z-Boat 1800 X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Compact remote-controlled hydrographic survey vessel from Teledyne Oceanscience, popular for inland water and shallow harbor surveys.
Z-Cargo X1. Cargo Science, Commodities and Cargo Care: MARPOL Annex II Category Z noxious liquid.
Z-Category NLS (Annex II Reg 6) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: A noxious liquid substance presenting a minor hazard, with the most permissive controlled discharge regime among regulated categories under Annex II.
Z-Class Lighthouse Beam F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Generic reference to characterized aid sequence.
Z-Class, Geneva F4. Recreational Boating, Yachting and Sport: Lake Leman one-design.
Z-Drive F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Azimuthing propulsion unit common on tugs.
Z-Drive Towboat X103. US Inland Waterway Towing and Barge: A towing vessel propelled by azimuthing thrusters arranged in a Z-drive configuration, used in increasing numbers in US harbor and fleet service.
Z-drive tug (Z-Peller) B5. Ship Types and Individual Vessels: Tug with azimuth thrusters.
Z-Listed Cargo X135. Chemical Tanker Operators and IBC Code Cargoes: MARPOL Annex II Category Z substance representing the lowest-hazard NLS such as ethylene glycol, methanol and propylene glycol.
Z-Peller X137. Harbour Tugs, Towage Operators and Tug Builders: Niigata's Z-drive azimuth thruster brand name.
Z-Peller (Niigata) X38. Propellers, Stern Gear and Shaft Lines: Niigata Power Systems' Z-drive azimuth thruster product family.
Z-Pendant F5. The Reference Layer: Glossary, Units, Signals and Information Sources: ICS substitute pennant equivalent reference.
Z-pulley Rigging Training F3. Seafaring Life, Education, Professions and Institutions: Specialist rope-rescue training.
Z-Series X8. IACS, Class Rules and Class Notations: IACS UR-Z series covering survey, certification and class transfer requirements.
Z-shore hardness X45. Marine Paints, Coatings and Antifouling: Loose term for shore-D hardness measurements of cured coatings.
Z-Spar Mast Section F4. Recreational Boating, Yachting and Sport: Manufacturer brand of dinghy and yacht spars.
Z-Surveys X54. Naval Architecture Software and IACS Rules: IACS UR Z series Unified Requirements covering periodical hull and machinery surveys.
Z-Tech X137. Harbour Tugs, Towage Operators and Tug Builders: RAL design family of Z-drive tugs with the wheelhouse forward and a long working aft deck, popular in container terminals.
Z-Tech 30 Series X30. Tug Operations and Harbour Towage: Robert Allan family of 30 m class Z-Tech tugs designed in cooperation with PSA Marine.
Z-Tech 4500 X30. Tug Operations and Harbour Towage: Smaller Robert Allan Z-Tech harbor tug design.
Z-Tech 6500 X30. Tug Operations and Harbour Towage: Mid-range Robert Allan Z-Tech ASD tug design.
Z-Tech 7500 X30. Tug Operations and Harbour Towage: 30 m class Robert Allan Z-Tech ASD harbor and terminal tug design.
Z-time B3. Nautical Science: Synonym for UTC.
Z-Twist X9. Cargo Securing, Lashing and Stability Vocabulary: Direction of wire rope lay; relevant to spin and torque under load.
Z10 Series X142. Classification Societies and Class Notations: IACS UR on hull surveys of tankers and bulkers.
Z18 Hose Test X155. Marine Surveying Practice and Cargo Inspection: The IACS Unified Requirement Z18 hose test procedure for hatch covers and other weathertight closures, used as the default acceptance test.
Z25 X92. Marine Steel Suppliers and Shipbuilding Plate: Through thickness ductility grade per EN 10164 with minimum 25 percent reduction of area in the Z direction.
Z35 X92. Marine Steel Suppliers and Shipbuilding Plate: Through thickness ductility grade per EN 10164 with minimum 35 percent reduction of area in the Z direction.
Zaandam X64. Cruise Industry Operators, Brands and Ships: Holland America Line R-class ship delivered in 2000.
Zafarana X124. Dredging Industry and Reclamation Contractors: Egyptian port dredging.
Zafiro X122. Submarine Cable Laying, Repair Vessels and Operators: ASN BU housing family for power-switched branches.
Zagazig University Egypt Marine Engineering X121. Maritime Education, Academies and Universities: Egyptian engineering faculty with marine engineering branch.
Zaibatsu Shipping F1. Maritime History: Pre-1945 Japanese conglomerate maritime arms, Mitsui, Mitsubishi, NYK.
Zaitsevsky stability criterion B1. Naval Architecture: Soviet-era weather criterion variant.
Zaiwalla and Co X114. Maritime Arbitration and Shipping Law Firms: London law firm with a sanctions and shipping disputes practice.
ZAMPA Bunker Service X72. Bunkering Hubs and Bunker Suppliers: Operational scheduling tool used by some bunker barge fleets in the Port of Antwerp.
Zandeman X124. Dredging Industry and Reclamation Contractors: Dutch term for dredge operator.
Zander (Sander lucioperca) X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: European pikeperch, freshwater species farmed in RAS facilities.
Zanzibar Maritime Authority X98. Ship Registries and Flag States: ZMA, flag administration of Zanzibar administering the Zanzibar ship register.
Zaporizhzhia Region (Sanctions) X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A non-government-controlled region of Ukraine subject to U.S. and EU embargo-style measures equivalent to those for Donetsk and Luhansk.
Zara, Sack of F1. Maritime History: 1202 Venetian diversion of the Fourth Crusade.
Zaratan X42. Offshore Wind Installation and Cable Lay: Cadeler jack-up installation vessel inherited from Seajacks.
Zarga X134. LNG and LPG Carrier Operators and Containment Systems: Q-Max LNG carrier of 266,000 m3 delivered 2010 by Samsung Heavy Industries for Nakilat.
Zarzuela Marine Themes F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Spanish operetta with maritime narratives.
Zawisza Czarny X128. Sail Training Ships and Tall Ship Associations: Polish three masted schooner built 1952 at Gdansk, 42 m length, owned by Polish Scouting Association ZHP, traditional Polish scout sail training ship.
ZCR Zone and Conduit Requirements X25. Maritime Cybersecurity, OT and IT: IEC 62443-3-2 risk assessment outputs defining security zones and conduits.
ZDA Sentence X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: NMEA 0183 sentence transmitting UTC time and date for time synchronization across bridge equipment.
ZDDP X61. Marine Lubricants and Cylinder Oils: Zinc dialkyldithiophosphate, a primary antiwear and antioxidant additive used in hydraulic and many engine oils.
ZDDP (Zinc Dialkyldithiophosphate) X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Anti-wear additive in some lubricants, limited in marine cylinder and system oils for ash control.
Zeamarine X81. Project Cargo, Heavy-Lift and Module Carriers: Bremen-based heavy-lift and project carrier operator that ceased trading in 2020.
Zebra mussel (Dreissena polymorpha) X18. Ballast Water, Biofouling and Antifouling: Freshwater bivalve invasive in the North American Great Lakes from 1988, dispersed by ballast water from European ports.
Zechstein seal X57. Ocean Energy Beyond Wind: Salt and anhydrite layers of the Zechstein Group that act as primary seals for several offshore CCS sites in the southern North Sea.
Zee-Pipeline (ZPT) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Pipeline connecting the Norwegian Norpipe system with Zeebrugge.
Zeebrugge X15. Ports, Terminals and Stevedoring: Belgian port with major ro-ro, container, and LNG terminals.
Zeebrugge APM Terminals X138. Global Container Terminal Operators and Port Equipment: Belgian North Sea facility, merged into Port of Antwerp-Bruges in April 2022.
Zeebrugge Bunker Service X72. Bunkering Hubs and Bunker Suppliers: Bunker supply at the Port of Zeebrugge by Mabanaft and TotalEnergies.
Zeebrugge casualty X163. Marine Accident Investigation Agencies and Landmark Inquiries: See Herald of Free Enterprise casualty (1987).
Zeebrugge Fish Auction X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: Belgian fish market, principal landing port for the Belgian beam-trawl fleet.
Zeebrugge Hydrogen Hub X140. Ammonia as Marine Fuel and Hydrogen Shipping: Port of Antwerp-Bruges expansion plan for NH3 cracking.
Zeebrugge LNG X56. LNG/LPG Carriers and IGC Code: LNG import and small-scale distribution terminal at Zeebrugge, Belgium, operated by Fluxys LNG.
Zeebrugge LNG Bunkering X110. LNG Bunkering Infrastructure and Vessels: LNG bunker operations at the Port of Zeebrugge, anchored by the Fluxys LNG terminal and the Engie Zeebrugge bunker vessel.
Zeebrugge Maritime Cluster F3. Seafaring Life, Education, Professions and Institutions: Belgian coastal maritime community.
Zeebrugge Maritime Day X119. Maritime Conferences, Trade Shows and Awards: Annual port event hosted by Port of Antwerp-Bruges.
Zeebrugge Mole F1. Maritime History: Target of the 1918 Royal Marines assault.
Zeebrugge Pilots X32. Marine Pilotage and Pilot Operations: Belgian pilots of NLBV-Brabo and Loodswezen Vlaanderen serving Zeebrugge.
Zeebrugge Pipeline Terminal X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Onshore terminal in Belgium receiving subsea gas pipelines including Interconnector UK and ZPT.
Zeebrugge Raid F1. Maritime History: Royal Navy 1918 attack on the Belgian U-boat base.
Zeebrugge Reefer X136. Reefer Vessels and Cool Chain Operators: Belgian port reefer container handling with strong fruit juice and frozen poultry profile.
Zeebrugge Salvage Hub X167. Major Salvage Companies, Wreck Removals, and Equipment: Belgian port frequently used as logistics base for North Sea salvage operations.
Zeebrugge terminal X57. Ocean Energy Beyond Wind: Belgian port that is a planned CO2 export terminal feeding Northern Lights and other offshore stores.
Zeebruggemax B5. Ship Types and Individual Vessels: Largest vessel fitting Zeebrugge locks (informal).
Zeelander Yachts X125. Superyacht Industry, Builders and Brokers: Dutch lobster style motoryacht builder.
Zeevaartmuseum, Antwerp F2. Maritime Culture, Heritage, Archaeology, Art and Museums: National Maritime Museum of Belgium.
Zelda X124. Dredging Industry and Reclamation Contractors: Boskalis TSHD.
Zelenodolsk X62. Naval Warships and Combat Systems: Russian shipyard on the Volga building Buyan-M and Admiral Grigorovich-class ships.
Zenit (ice radar) X27. Polar Code, Ice Navigation and Polar Operations: Russian-supplied ice radar systems used by Russian icebreakers.
Zenitec Simulator (Russia) X144. Bridge Simulators, Engine Room Simulators, and Maritime Training Equipment: Saint Petersburg simulator manufacturer.
Zenith B3. Nautical Science: Point on celestial sphere directly overhead.
Zenith Class X164. Cruise Industry, Brands, Ship Classes, and Terminals: An older Celebrity Cruises class of two ships, Horizon and Zenith, since sold to Pullmantur and other operators.
Zenith distance B3. Nautical Science: 90° minus altitude.
Zenith distance (ZD) X16. Nautical Science, Navigation and COLREGs: 90 degrees minus altitude; angular distance from zenith to body.
Zenith Pass X80. Maritime Search and Rescue Coordination: Satellite pass directly overhead a beacon, providing best Doppler fix.
Zenith Sailmakers F4. Recreational Boating, Yachting and Sport: Generic example of a sail loft.
Zenith Tidal Force D2. Hydrography, tides, waves, bathymetry and marine geology: Maximum tide-producing force directly below the perturbing body.
Zenith Total Delay (Marine GPS) D5. Coastal processes, sea-level, cryosphere and ocean observation science: Tropospheric delay parameter from GPS used in atmospheric studies.
Zenith Voltage X67. Marine Electrical Systems and Shore Power: Peak instantaneous value of an AC waveform, used in insulation withstand calculations.
ZenithEye X70. Reefer Containers and Cold Chain Shipping: Mediterranean Shipping Company reefer monitoring service providing in-transit data to shippers.
Zenkai (ZPMC term) X94. Port Machinery and Quay Equipment Makers: Operational term for sea-fastening cranes during the ZPMC heavy-lift voyages.
Zenobe Gramme X128. Sail Training Ships and Tall Ship Associations: Belgian Navy auxiliary ketch built 1961 at Boel Tamise, 28 m length, smallest commissioned Belgian Navy vessel, used for sail training and oceanographic work.
Zenon Hatch Cover X46. Container Terminal Operations: A historic European pontoon hatch cover product line used on bulk and multipurpose vessels.
Zentech Jackup X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Zentech-designed jackups used by smaller contractors in shallow water international markets.
Zeolite X1. Cargo Science, Commodities and Cargo Care: Molecular sieve; cargo for catalyst markets.
Zeolite Softener X63. Marine Auxiliary Machinery and Pumps: Ion exchange unit used to soften feed water for auxiliary boilers.
Zephyr X3. Ship Handling, Seamanship and Deck Vocabulary: Light westerly breeze.
Zephyr (heritage) X128. Sail Training Ships and Tall Ship Associations: Various small Class C training yachts carry the name in STI registers.
Zeppelin Naval Service F1. Maritime History: Imperial German airship reconnaissance in support of the High Seas Fleet.
Zero alcohol policy X21. STCW Certificates, Crewing and Seafarer Welfare: Stricter than STCW 0.05 percent BAC limit, adopted by many companies and flag States.
Zero Boil-Off (ZBO) X20. LNG Operations and Custody Transfer: Operational state achieved on reliquefaction-equipped carriers (Q-Flex, Q-Max) where all BOG is reliquefied.
Zero Carbon Fuel D6. Decarbonization, emissions and alternative fuels: Fuel with no direct CO2 emissions at the point of use, such as ammonia or hydrogen.
Zero Carbon Targets X158. IMO Conventions, Protocols, Codes, and Resolutions: IMO strategic targets under MEPC.377(80) aiming for net-zero GHG emissions from international shipping by or around 2050.
Zero Crossing Bottom Detector X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Bottom-detection algorithm in single-beam echosounders that picks the first significant return for depth estimation.
Zero Cure Zero Pay X60. Marine Salvage and Wreck Removal: Vernacular reformulation of the no cure no pay principle.
Zero Day X25. Maritime Cybersecurity, OT and IT: Vulnerability unknown to the vendor at the time of exploitation.
Zero Discard X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: Operational philosophy under the EU Landing Obligation.
Zero Discharge D3. Marine environmental science, pollution and conservation: Operational standard prohibiting discharges of certain wastes.
Zero Discharge (Fish Processing) X87. Fishing Vessels and Fisheries Management: Operational goal on factory trawlers to retain or use all parts of the catch, encouraged by FAO Code of Conduct Article 8.4.
Zero Discharge (Plastics, Annex V) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: The complete prohibition under MARPOL Annex V Reg 3 on the discharge of all plastics anywhere at sea.
Zero discharge (Polar Code) X27. Polar Code, Ice Navigation and Polar Operations: Operational discharge of oil, NLS, sewage and garbage strictly limited or prohibited in polar waters per Polar Code Part II-A.
Zero Discharge Compliance X86. Port Agency, Husbandry and Disbursement: Compliance with zero discharge regimes at certain sensitive ports.
Zero discharge mode C2. Ship operations, crewing and technical management: Operation with no discharge to sea.
Zero discharge OTEC X57. Ocean Energy Beyond Wind: Operational concept in which OTEC plants minimize thermal and chemical discharge to surrounding waters.
Zero Discharge Policy X28. Ship Recycling and End-of-Life: Yard policy preventing discharge of pollutants to sea or land during recycling.
Zero discharge target X147. Ship Recycling, Hong Kong Convention, and Recycling Yards: An aspirational standard, sometimes referenced in Maersk RSRS and EU SRR audits, for hazardous waste leakage from yard operations.
Zero Discharge to Sea Standard X118. Ship Recycling Yards, Beaches and Regulation: Facility-level requirement under HKC SRFP to manage all wash water and runoff via collection systems.
Zero Drift X96. Hull Integrity Monitoring and Strain Gauges: Slow change in the unloaded baseline output of a strain gauge channel, addressed by periodic re-zeroing and temperature compensation.
Zero Emission Mode X67. Marine Electrical Systems and Shore Power: Operating condition in which the ship is propelled and serviced entirely from batteries or shore power with all combustion engines stopped.
Zero Emission Pilot Project D6. Decarbonization, emissions and alternative fuels: Demonstration project for zero-emission vessels.
Zero emission terminal C4. Ports, terminals and coastal/marine civil engineering: Terminal targeting zero direct emissions.
Zero Emission Vessel (ZEV) D6. Decarbonization, emissions and alternative fuels: Vessel with no greenhouse gas emissions from operation.
Zero Emission Yard X94. Port Machinery and Quay Equipment Makers: Terminal configuration using electric RTGs, electric tractors, and shore-charged AGVs.
Zero Heel Condition X9. Cargo Securing, Lashing and Stability Vocabulary: Upright condition used as reference in stability calculations.
Zero Observation Inspection X40. Tanker Vetting, SIRE and VIQ: A SIRE inspection completed without any inspector-recorded observations, sometimes used internally by operators as a fleet performance benchmark.
Zero off-hire clause C1. Commercial shipping, chartering, economics and finance: Clause limiting events causing off-hire.
Zero or Near-Zero GHG Fuels X112. IMO GHG Strategy, CII, EEXI and EU Maritime Regulation: Fifth level of ambition under MEPC.377(80) targeting an uptake of at least 5 percent and striving for 10 percent by 2030.
Zero Outstanding Recommendations X142. Classification Societies and Class Notations: Class status confirming the absence of Conditions of Class.
Zero Radiation Reading X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: A condition for Class 7 Category I-WHITE labels indicating dose rate at surface not exceeding 0.005 mSv/h.
Zero rated VAT C3. Logistics, freight forwarding and multimodal trade: VAT treatment for exports.
Zero Reading X155. Marine Surveying Practice and Cargo Inspection: The reference point on a tank capacity table corresponding to a sounding of zero, sometimes located at the keel or at the bottom of the sounding pipe.
Zero Recourse Loan X49. Ship Finance, Leasing and Maritime Capital Markets: Loan in which the lender has no claim beyond the pledged assets, distinct from limited recourse structures.
Zero Sequence Current Transformer X67. Marine Electrical Systems and Shore Power: Window-type CT enclosing all three phase conductors to detect residual ground fault current.
Zero Speed Bollard Pull X79. Tugs and Towage Industry: Bollard pull recorded at zero forward speed during a static trial, the standard reporting basis.
Zero Speed Log X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: Doppler log capable of providing accurate speed at very low or zero speed-through-water, important for berthing.
Zero Speed RAO X54. Naval Architecture Software and IACS Rules: Response Amplitude Operator computed at zero forward speed for moored vessel analyses.
Zero speed stabilizers X156. Superyacht Industry, Builders, and Yacht Charter Market: Active fin or gyroscopic stabilizers fitted on superyachts to reduce roll at anchor, with brands including Quantum, CMC Marine, Naiad Dynamics, and Seakeeper.
Zero subsidy X42. Offshore Wind Installation and Cable Lay: Bidding outcome where offshore wind developers accept the wholesale market price without a contract for difference top up, first achieved in the Dutch Borssele tender.
Zero Tension Splice X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Splice configuration in HMPE rope designed to maintain full strength when not under significant tension during handling.
Zero tolerance X7. Flag State, Port State Control and Detention Vocabulary: PSC approach applied to specific deficiency types, such as falsified oil record book entries, leading to immediate detention.
Zero Tolerance Findings X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: SIRE 2.0 finding categories triggering immediate operator and OCIMF escalation regardless of trade risk.
Zero Tolerance on Harassment X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Industry slogan crystallized by MLC 2016 amendment and supported by ICS and ITF guidance.
Zero Tolerance Pathogen X41. Cruise Ship Public Health and VSP/USPH: Pathogen such as Listeria monocytogenes in certain RTE foods for which no detectable level is acceptable.
Zero Trust X48. Maritime Cybersecurity: Architectural approach that assumes no implicit trust based on network location and verifies every access request.
Zero Trust (Maritime) E3. Technology, digitalization and smart shipping: Cyber model requiring verification of every device/user.
Zero Trust Architecture E1. Maritime security, geopolitics and risk: Cyber paradigm assuming breach; verifying every request.
Zero-blame culture X163. Marine Accident Investigation Agencies and Landmark Inquiries: Operational corollary of the Casualty Investigation Code that encourages free disclosure by seafarers because their statements are protected from use in liability proceedings.
Zero-Coupon Bond X29. Ship Sale and Purchase, Management Contracts and Valuation: Discount instrument occasionally used in ship finance structures.
Zero-Day Exploit E1. Maritime security, geopolitics and risk: Previously unknown cyber vulnerability exploitable before patch.
Zero-discharge requirement X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: While addressed under MARPOL, certain SOLAS II-2/4 oil-fuel and bilge separation provisions cross-reference discharge prohibitions.
Zero-Emission Ferry E4. Cruise, offshore energy and auxiliary/specialised fleets: Battery-electric short-route ferry.
Zero-Emission Shipping Conference X119. Maritime Conferences, Trade Shows and Awards: Annual Copenhagen event hosted by the Mission Innovation initiative since 2020.
Zero-Emission Shipping Mission (ZESM) X34. Decarbonization, Alternative Fuels and Carbon Pricing: Mission Innovation track targeting commercially viable zero-emission ships by 2030.
Zero-headspace X26. Reefer Containers and Cold Chain Logistics: Loading pattern with cargo extending to ceiling; impedes airflow and is generally avoided.
Zero-Out Clause X17. Chartering, Shipbroking and Freight Trading: Time charter provision setting hire to zero during certain off-hire events.
Zero-Rated Stores Invoice X120. Marine Catering, Provisions and Ship Chandlers: VAT and GST exempt invoicing under most national rules for vessels on international voyages.
Zero-Speed Conn X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Final pilotage phase where the vessel is at zero speed through the water, requiring only tug-and-line coordination.
Zero-speed seakeeping X162. Naval Architecture, Stability, Resistance, and Structural Design: Hydrodynamic analysis of moored or station-keeping vessels with Froude number near zero, dominated by wave-frequency and drift forces.
Zero-speed stabilizer X35. Yacht and Superyacht Industry: Stabilization system effective at anchor as well as underway.
Zero-tolerance Boarding X127. Maritime Security, Anti-Piracy and PMSCs: Industry term for PCASP rules of engagement requiring visible warning shots before lethal engagement.
Zero-Tolerance Clause X151. Maritime Sanctions, Dark Fleet, and Price Cap Regimes: A contractual provision used by some traders to disqualify counterparties with any sanctions touch-point, more stringent than risk-based screening.
Zero-Touch Provisioning X68. Maritime Satcom and Telecommunications: Automatic configuration of vessel terminals upon power-up without on-site intervention.
Zero-Wind Drifter F4. Recreational Boating, Yachting and Sport: Light-air spinnaker.
Zerologon X25. Maritime Cybersecurity, OT and IT: See CVE-2020-1472.
Zespri X136. Reefer Vessels and Cool Chain Operators: New Zealand kiwifruit marketer using reefer containers for global exports, with peak shipping window from May to October.
ZESTAs D6. Decarbonization, emissions and alternative fuels: Zero Emission Ship Technology Association advocating for zero-emission shipping.
ZESTAs (Zero Emission Ship Technology Association) X149. Marine Fuels, Bunkering, and Alternative Fuels: An industry association advocating for zero-emission propulsion technologies and fuels.
ZESTIA X70. Reefer Containers and Cold Chain Shipping: Daikin reefer container unit family marketed for energy efficient marine container refrigeration.
ZETA X112. IMO GHG Strategy, CII, EEXI and EU Maritime Regulation: ClassNK suite for CII, EEXI, EU MRV, and EU ETS compliance reporting.
Zeus X89. ECDIS and Bridge Equipment Makers: B&G chartplotter platform for the sailing and motor yacht market within the Navico Group.
Zeus pod drive X125. Superyacht Industry, Builders and Brokers: Mercury Marine's pod drive used on smaller superyachts.
Zeus Tradition Marine Ltd v Bell [2000] 2 Lloyd's Rep 587 X143. Landmark Maritime Law Cases and Doctrines: English Court of Appeal on marine insurance trading warranties.
Zeven Provincien X124. Dredging Industry and Reclamation Contractors: Boskalis TSHD of 11,000 m3.
ZF AT thruster X38. Propellers, Stern Gear and Shaft Lines: ZF azimuth thruster (AT series) for offshore and tug applications.
ZF Marine X90. Marine Engine Specific Model Enumeration: German manufacturer of marine transmissions and V-drive gearboxes widely used with high-speed and medium-speed marine diesels.
ZF marine gear X38. Propellers, Stern Gear and Shaft Lines: ZF Friedrichshafen reduction and reversing gearboxes (e.g., ZF 7000 series) used in workboat and naval shaft lines.
Zhanjiang X124. Dredging Industry and Reclamation Contractors: Chinese port deepening by CCCC.
Zhaotou-class X130. National Coast Guards and Cutter Fleets: China Coast Guard 12,000-ton Type 818 cutter, two hulls CCG 2901 and CCG 3901 commissioned 2015-2017, world's largest coast guard vessels.
Zhejiang Energy X134. LNG and LPG Carrier Operators and Containment Systems: Chinese provincial utility operating LNG receiving terminal at Zhoushan and chartered LNG carrier fleet.
Zhejiang International Maritime College X55. Marine Simulators, Training and Maritime Academies: Chinese vocational maritime college in Zhoushan, Zhejiang Province.
Zhejiang Ocean University F3. Seafaring Life, Education, Professions and Institutions: Chinese maritime university at Zhoushan.
Zhen Hua Heavy Lift X167. Major Salvage Companies, Wreck Removals, and Equipment: Chinese semisubmersible carrier sometimes engaged in dry tow of salvaged casualties.
Zheng He F1. Maritime History: Ming admiral who led seven treasure voyages 1405 to 1433.
Zheng He Memorial Hall, Nanjing F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Chinese heritage site commemorating Ming voyages.
Zheng He Treasure Ship Replica F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Modern Nanjing reconstruction project.
Zhenhua 30 X123. Offshore Wind Installation Vessels and Operators: ZPMC floating crane vessel, 12,000 t lift capacity, used for Chinese offshore wind topside installation.