Charter Glossary
Clear, authoritative definitions of yacht charter, marine industry, and boat licensing terms. Curated for charter customers, boat owners, and captains.
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COI vs. Uninspected
The regulatory distinction between inspected passenger vessels (7+ paying passengers) and uninspected vessels (up to 6).
Captained Charter
A charter where a USCG-licensed captain operates the vessel. The customer is a passenger, not the operator.
Catamaran
A multi-hull vessel with two parallel hulls connected by a bridgedeck, valued for stability and interior space.
Center Console
A powerboat design with a single open cockpit and the helm in a console at the center of the boat.
Certificate of Inspection (COI)
A USCG certificate required for passenger vessels carrying seven or more paying passengers.
Charter Broker
An agent who matches charter customers with vessels and owners, typically earning a commission from each booking.
Charter Insurance
Commercial marine insurance covering a charter vessel, its passengers, crew, and third-party liabilities during paid trips.
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Day Charter
A single-day charter trip, typically 4-8 hours, where guests return to the dock the same day.
Displacement
The weight of water a vessel displaces when floating, equal to the total weight of the vessel and its contents.
Draft
The vertical distance between the waterline and the deepest point of a vessel's hull or keel.
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MMC (Merchant Mariner Credential)
The official USCG document containing all of a mariner's licenses, endorsements, and ratings.
Marina
A commercial facility providing docking, fueling, maintenance, and support services for recreational boats.
Marine Survey
A professional inspection of a vessel's hull, systems, and equipment performed by a qualified marine surveyor.
Masters License
A tiered USCG license authorizing a captain to operate an inspected passenger vessel, sized by vessel tonnage.
Mega Yacht
An informal term for a large private yacht, typically 80-200 feet, with a professional crew.
Monohull
A vessel built on a single hull — the traditional design for most yachts, sailboats, and powerboats.
Mooring Ball
A permanent floating buoy attached to a heavy anchor or screw, used to secure a vessel without its own anchor.
Motor Yacht
A yacht propelled by engine, typically purpose-built for comfort, speed, and amenities rather than sailing performance.
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STCW
An international convention setting minimum training, certification, and watchkeeping standards for commercial seafarers.
Sailing Yacht
A yacht propelled primarily by sail, typically with auxiliary engine power for maneuvering and calm-wind passages.
Sea Trial
A real-world operational test of a vessel under way, used to verify performance, handling, and system operation.
Six-Pack License
Informal name for the USCG OUPV license, which caps carriage at six paying passengers on an uninspected vessel.
Slip
An assigned docking space at a marina, rented by the month, season, or year.
Sport Fishing
Recreational offshore fishing, typically for billfish, tuna, or other game species, often conducted as a charter.
Sportfish
A purpose-built yacht designed for offshore sport fishing, combining a cabin interior with a dedicated fighting cockpit.
Superyacht
A private yacht typically 200 feet (60 meters) and larger, with a full professional crew and high-end interior.
