Other Water Transportation Industry Terminology

AIS (Automatic Identification System)

A VHF-based transponder system that broadcasts a vessel’s identity, position, course, speed, and other voyage data to enhance navigational safety, traffic management, and compliance.

Used phrases: 'Update the AIS status to restricted in ability to maneuver before entering the dredge area.' 'Charterers track the vessel’s AIS to validate adherence to the agreed route and ETA.' 'VTS flagged a discrepancy between the ship’s AIS draught and the declared draught.'

Anti-fouling Systems (AFS)

Coatings or treatments applied to hulls to prevent marine organism growth that increases drag and fuel consumption; regulated globally to ban harmful organotin compounds and manage biofouling.

Used phrases: 'The shipyard will recoat with an AFS compliant with the AFS Convention.' 'Biofouling increased fuel burn; we advanced dry docking to refresh the AFS.' 'The charterer prefers silicone-based AFS for reduced hull resistance.'

Ballast Water Management (BWM)

Practices and onboard treatment technologies that prevent the spread of invasive species via ballast water; governed by IMO and USCG rules specifying performance standards and recordkeeping.

Used phrases: 'The vessel meets the D-2 standard using UV filtration ballast systems.' 'USCG granted an extension for the BWM equipment installation.' 'We planned an exchange outside the ECA per the voyage plan.'

Bareboat Charter

A demise charter in which operational control and crewing transfer to the charterer, who assumes most responsibilities and costs, while the owner provides the vessel without crew or stores.

Used phrases: 'Under the bareboat charter, the charterer supplies crew and takes operational control.' 'The owner remains responsible for financing while the demise charterer handles OPEX.' 'Switching from time charter to bareboat shifts crewing liability.'

Barge

A flat-bottomed, typically unpowered vessel moved by tugs for inland and coastal transport of bulk, project, or container cargoes; common in towage and inland waterway operations.

Used phrases: 'The project will use a hopper barge and a pusher tug on the inland river.' 'Deck barges are scarce during peak offshore wind mobilizations.' 'Barge fleeting capacity near the terminal is fully booked.'

Bill of Lading (B/L)

A document serving as a receipt for goods, evidence of the contract of carriage, and a document of title; key types include straight, order, and seaway bills with differing negotiability.

Used phrases: 'Issue a clean on-board B/L once loading completes.' 'The bank requires an original negotiable B/L under the LC.' 'We converted to a seaway bill to avoid courier delays.'

Bunkering

The supply of marine fuel to a vessel, encompassing operational, safety, and quality-control procedures; includes fuels such as VLSFO, MGO, LNG, and emerging low- or zero-carbon alternatives.

Used phrases: 'We’ll stem 700 MT of VLSFO via barge-to-ship bunkering at the outer anchorage.' 'Retain fuel samples and the BDN for any quality claims.' 'Biofuel bunkering trials cut well-to-wake emissions.'

Cabotage

Laws restricting domestic coastal or inland transport between two points in the same country to national-flag vessels; significantly impacts fleet selection, cost, and routing.

Used phrases: 'The Jones Act restricts cabotage to US-built, US-flagged, US-crewed vessels.' 'Cabotage exemptions would alter the coastal feeder economics.' 'Local cabotage rules affect the OSV deployment plan.'

Charter Party

The contract governing the terms of carriage or hire between shipowner and charterer, specifying obligations, rates, laytime, demurrage, and operational clauses; standardized forms are common.

Used phrases: 'We’ll use BIMCO GENCON for the voyage charter party.' 'The safe port clause and weather warranty were heavily negotiated.' 'Laytime and demurrage terms differ between NYPE and SUPPLYTIME.'

Cold Ironing (Shore Power)

Connecting a ship at berth to land-based electrical power so main and auxiliary engines can be shut down, reducing local air emissions and noise; also called shore power or alternative maritime power.

Used phrases: 'The ferry will plug into shore power to meet local emission requirements.' 'CAPEX for cold ironing can be offset by port tariff incentives.' 'AMP compatibility is now a berth selection criterion.'

COLREGs (International Regulations for Preventing Collisions at Sea)

The international navigation rules setting conduct for vessels at sea, including right-of-way, lights and shapes, sound signals, and traffic separation scheme rules to prevent collisions.

Used phrases: 'Rule 10 compliance is critical in the TSS.' 'Display the correct lights and shapes during towing operations.' 'The stand-on vessel must still avoid collision if risk increases.'

Deadweight Tonnage (DWT)

The maximum weight a ship can safely carry, measured in metric tons, including cargo, fuel, freshwater, provisions, and crew, but excluding the ship’s own weight.

Used phrases: 'A 75,000 DWT bulker is suitable for the draft-limited port.' 'Freight rates are often benchmarked by DWT class.' 'Cargo, bunkers, and stores together cannot exceed DWT limits.'

Demurrage

A liquidated-damages fee payable to the shipowner or terminal when cargo operations exceed the agreed laytime; compensates for time lost and ship utilization impacts.

Used phrases: 'Demurrage started once laytime expired at 1800 hours.' 'The receiver agreed to pay demurrage due to terminal delays.' 'Despatch applies if we finish before laytime, the inverse of demurrage.'

Draft (Draught)

The vertical distance from the keel to the waterline, indicating how deep a vessel sits; governs port access, under-keel clearance, and channel transit limits.

Used phrases: 'Max allowable draft at the bar is 12.0 m, tide-dependent.' 'Maintain UKC of 10% of draft per company policy.' 'We’ll trim by stern to pass the shallow reach safely.'

ECDIS (Electronic Chart Display and Information System)

A certified electronic navigation system that displays official electronic navigational charts and integrates sensors for safe route planning and monitoring, mandatory on many SOLAS-class ships.

Used phrases: 'ECDIS must be updated with the latest ENCs and Notices to Mariners.' 'The passage plan is checked on ECDIS with safety contours set.' 'Paper charts are no longer the primary means on SOLAS vessels with ECDIS.'

EEDI (Energy Efficiency Design Index)

A design-based metric of CO2 emissions per transport work for new ships, setting progressively stricter efficiency standards at the design stage to reduce lifetime emissions.

Used phrases: 'This newbuild meets Phase 3 EEDI targets.' 'Yard optimized hull lines to lower EEDI.' 'Financiers ask for EEDI data in loan green-tagging.'

EEXI (Energy Efficiency Existing Ship Index)

A technical efficiency standard applied to existing ships, assessing design-related CO2 intensity and often requiring modifications such as engine power limitation or retrofits.

Used phrases: 'To comply with EEXI, we installed an engine power limiter.' 'The EEXI technical file was approved by class.' 'EEXI compliance influenced the time-charter negotiations.'

Emission Control Area (ECA)

Geographic zones with stricter air emission limits for SOx, NOx, and particulates, requiring cleaner fuels or abatement technologies while operating within the area.

Used phrases: 'Switch to 0.10% sulfur fuel before entering the ECA.' 'NOx Tier III applies for newbuilds operating in the North American ECA.' 'ECA surcharges are reflected in the freight quote.'

ETA/ETD/ATA/ATD

Common scheduling acronyms: Estimated/Actual Time of Arrival and Estimated/Actual Time of Departure; used for voyage planning, port coordination, and charter party time calculations.

Used phrases: 'Update the ETA after weather routing adjustments.' 'Delayed ETD impacts the next port window.' 'ATA logged at 0615 triggers laytime per the CP.'

Flag State

The country under whose laws a vessel is registered; responsible for enforcing international regulations, issuing certificates, and overseeing safety and environmental compliance.

Used phrases: 'Liberia is the vessel’s flag state.' 'The flag state issued the SMC and ISM DOC.' 'PSC detention triggered a flag state review.'

Gross Tonnage (GT)

A dimensionless measure of a ship’s overall internal volume used for regulatory thresholds, port fees, and certification, distinct from weight-based measures like DWT.

Used phrases: 'Port dues scale with GT.' 'Vessels over 500 GT have additional SOLAS obligations.' 'Terminal requires GT data for berth planning.'

H&M Insurance (Hull and Machinery Insurance)

Insurance covering physical loss or damage to a vessel’s hull and mechanical equipment, complementing P&I coverage for third-party liabilities.

Used phrases: 'The H&M policy covers grounding damage to the propeller.' 'Higher deductibles lowered the H&M premium.' 'Coordinate H&M claim with P&I for pollution liabilities.'

Incoterms

International commercial terms published by the ICC that define delivery, risk transfer, and responsibilities between seller and buyer; waterway-relevant rules include FAS, FOB, CFR, and CIF.

Used phrases: 'Under CFR the seller arranges carriage but risk passes at loading.' 'CIF requires insurance arranged by the seller.' 'Avoid using FOB for containerized cargo; use FCA instead.'

IMO (International Maritime Organization)

The United Nations specialized agency responsible for global maritime safety, security, and environmental standards, including SOLAS, MARPOL, and other key conventions.

Used phrases: 'IMO conventions like SOLAS and MARPOL set the regulatory baseline.' 'Every ship has a unique IMO number.' 'The IMO strategy guides decarbonization targets.'

ISM Code

The International Safety Management Code requiring companies and ships to implement a Safety Management System that ensures safe operation and pollution prevention, audited by class/flag.

Used phrases: 'The company’s SMS is certified under the ISM Code.' 'A DOC is required for the operator and an SMC for the ship.' 'ISM nonconformities were rectified before the next audit.'

ISPS Code

The International Ship and Port Facility Security Code establishing a framework to detect and deter threats to ships and port facilities through assessed security levels and plans.

Used phrases: 'Raise the security level per the ISPS Code.' 'SSP drills and PFSP coordination were completed.' 'ISPS noncompliance can result in PSC detention.'

Laytime

The agreed time allowed for loading and discharging cargo under a voyage charter; when exceeded, demurrage applies, and when saved, despatch may be payable.

Used phrases: 'Laytime counts from valid NOR, berth time excluded.' 'Reversible laytime across load and discharge saved costs.' 'The laytime statement supports the demurrage claim.'

Lightering

The transfer of cargo between vessels, often offshore, to adjust draft, manage port constraints, or redistribute cargo; common with tankers and bulkers via ship-to-ship operations.

Used phrases: 'STS lightering reduced draft to cross the bar.' 'We obtained approvals and fenders for crude lightering offshore.' 'Weather delays extended the lightering window.'

LOA (Length Overall)

The maximum length of a vessel measured from the foremost to the aftermost points, used for berth allocation, lock and canal restrictions, and port fees.

Used phrases: 'Berth limitations cap LOA at 300 meters.' 'Lockage fees depend on LOA and beam.' 'We trimmed berth selection due to LOA plus tug clearance.'

MARPOL

The International Convention for the Prevention of Pollution from Ships, with annexes covering oil, noxious liquids, harmful substances, sewage, garbage, and air emissions.

Used phrases: 'OWS use must comply with MARPOL Annex I.' 'Garbage management follows Annex V requirements.' 'Annex VI governs fuel sulfur limits and EIAPP certificates.'

Marine Pilotage

The service of qualified pilots boarding vessels to advise the master in confined or challenging waters to ensure safe navigation and maneuvering, often mandated by local law.

Used phrases: 'Pilotage is compulsory for this river transit.' 'Pilot ladder must meet SOLAS and IMO guidelines.' 'A PEC allows masters to self-pilot on specific routes.'

Mooring

The process and arrangement of lines, anchors, or mooring systems to secure a vessel to a berth, buoy, or anchorage; critical for safety and berth operability.

Used phrases: 'The mooring plan calls for breast lines and spring lines to shore.' 'Beware snap-back zones during line handling.' 'Environmental limits may trigger unmooring.'

Nautical Mile

A unit of distance used at sea equal to 1,852 meters, based on one minute of latitude, forming the basis for voyage distances and charting.

Used phrases: 'The tug transit is 42 nautical miles upriver.' 'Port charges include a pilotage fee per nautical mile.' 'Routing added 120 nm to avoid heavy weather.'

Notice of Readiness (NOR)

A formal notice from the master stating the vessel is ready to load or discharge, which, if valid, starts the laytime clock under voyage charter terms.

Used phrases: 'Master tendered NOR at anchorage per the CP.' 'NOR invalidity can void laytime commencement.' 'WIBON wording allowed NOR before berthing.'

Open Registry (Flag of Convenience)

A flag state that allows foreign-owned vessels to register with flexible regulations and competitive costs; attractive for commercial reasons but closely watched by PSC and stakeholders.

Used phrases: 'Panama and Liberia are popular open registries.' 'Open registry selection reduces crewing cost but raises ESG scrutiny.' 'Audit the registry’s PSC detention track record.'

P&I Club (Protection & Indemnity)

A mutual insurer providing liability cover to shipowners and charterers for third-party risks such as pollution, cargo claims, crew injury, and wreck removal; many belong to the International Group.

Used phrases: 'The P&I Club will respond to the cargo contamination claim.' 'Blue Card issuance is needed for CLC compliance.' 'IG Club cover complements H&M insurance.'

Port State Control (PSC)

Inspections conducted by national authorities on foreign ships to verify compliance with international conventions; may result in deficiencies, detentions, or bans.

Used phrases: 'The vessel was detained after a PSC inspection found ISM deficiencies.' 'Paris MoU white list affects targeting.' 'We prepped a PSC checklist before entering the port.'

Ro-Ro (Roll-on/Roll-off)

A vessel or operation in which wheeled cargo is driven on and off via ramps, including ferries and pure car/truck carriers, emphasizing stowage, lashing, and stability control.

Used phrases: 'PCTCs carry vehicles via internal ramps.' 'Lashing plans are critical for Ro-Ro safety.' 'The Ro-Ro berth requires a stern ramp configuration.'

Seaworthiness

The condition of a ship being fit in structure, equipment, crew, and documentation to undertake the intended voyage safely and carry the contracted cargo.

Used phrases: 'Unseaworthiness can void insurance coverage.' 'Class status and manning affect seaworthiness.' 'Owners warrant the vessel’s seaworthiness at the commencement of the voyage.'

SOLAS (International Convention for the Safety of Life at Sea)

The cornerstone international treaty setting minimum safety standards in construction, equipment, and operation of ships, covering navigation, lifesaving, fire protection, and more.

Used phrases: 'SOLAS Chapter V mandates voyage planning.' 'LSA inspections are recorded per SOLAS requirements.' 'GMDSS equipment must be SOLAS-compliant.'

STCW (Standards of Training, Certification and Watchkeeping)

The international convention that sets minimum qualification, certification, and watchkeeping standards for seafarers across ranks and departments.

Used phrases: 'All officers must hold valid STCW endorsements.' 'Rest hours are tracked to comply with STCW.' 'PSC cited an expired STCW medical certificate.'

TEU/FEU

Container capacity units: Twenty-foot Equivalent Unit and Forty-foot Equivalent Unit; common metrics for planning, pricing, and benchmarking container operations.

Used phrases: 'The barge’s capacity is 400 TEU.' 'Slot cost is calculated per TEU for the service.' 'Forecasts shifted demand from FEU to mixed TEU bookings.'

Time Charter

A hiring arrangement where the charterer pays a daily rate to use the vessel for a period, directing employment while the owner manages crewing and technical operations.

Used phrases: 'The time charter rate is USD 23,000 per day, plus bunkers for charterers’ account.' 'Off-hire applies during main engine breakdown.' 'The C/P includes a speed and consumption warranty.'

Towage

The assistance of tugs to maneuver or tow vessels and barges for harbor moves, river transits, or coastal tows; distinct from salvage and usually under standard local conditions.

Used phrases: 'Towage services are compulsory for berthing at this terminal.' 'The towage contract follows UK Standard Conditions.' 'We chartered a tug for a coastal barge tow.'

Ullage

The empty space in a tank above the liquid cargo; measured to calculate quantities and ensure safe loading without overfilling or over-pressurization.

Used phrases: 'Ullage readings confirm cargo volume in the tanks.' 'Closed gauging is required for volatile cargoes.' 'We adjusted loading to maintain safe ullage margins.'

Vetting

A due diligence assessment of a ship’s condition, safety management, and operational performance, often by oil majors or third parties, to determine suitability for cargoes.

Used phrases: 'The tanker failed SIRE vetting due to maintenance findings.' 'RightShip vetting impacts dry bulk fixture opportunities.' 'Charterers require satisfactory vetting before nomination.'

Voyage Charter

A contract to carry a specific cargo between named ports for an agreed freight rate, with laytime and demurrage provisions governing time in port.

Used phrases: 'Freight is USD per metric ton under the voyage charter.' 'Laytime and demurrage are defined in the GENCON form.' 'The itinerary includes one load port and two discharge ports.'

VTS (Vessel Traffic Service)

A shore-based service that monitors and manages vessel traffic in designated areas to enhance safety and efficiency through information, organization, or navigation assistance.

Used phrases: 'Report to VTS at the pilot station on VHF 12.' 'VTS advised holding position due to channel congestion.' 'Mandatory VTS participation applies to vessels over 300 GT.'

Weather Routing

The process of planning and dynamically adjusting a voyage based on meteorological and oceanographic data to minimize risk, time, or fuel consumption.

Used phrases: 'Weather routing reduced heavy-weather damage risk and fuel burn.' 'We accepted a longer rhumb line for a safer ETA.' 'CII scores improved with optimized routing.'

Zero-Emission Vessel (ZEV)

A ship designed to operate without greenhouse gas emissions at the point of use, using technologies such as batteries, fuel cells with green hydrogen or ammonia, or wind-assist systems.

Used phrases: 'The operator placed orders for ammonia-ready ZEVs.' 'Green corridor initiatives prioritize ZEV compatibility.' 'Port infrastructure for ZEV bunkering is a strategic constraint.'