gaff A spar used to extend the top edge of a fore-and-aft sail.
gaff-topsail A light triangular or quadrilateral sail set over a gaff.
Gale A storm with a wind speed between 34 to 40 knots.
gale 1. An unusually strong wind. 2. In storm-warning terminology, a wind of 28-47 knots (52-87 kilometers or 32-63 miles per hour).
gale force winds Wind speeds strong enough to qualify the storm as a gale.
Galley: The kitchen.
Gallows A frame used to support the boom.
Gang A number of workmen acting together especially for loading and/or discharging operations of a vessel in combination with the necessary gear. (On a vessel for instance 6 gangs can be ordered to discharge or load.)
GANGWAY A narrow portable platform used as a passage, by persons entering or leaving a vessel moored alongside a pier or quay.
GANGWAY The area of a ship's side where people board and disembark.
Gantry Crane A crane or hoisting machine mounted on a frame or structure spanning an intervening space, which often travels on rails.
Garments On Hangers Clothes in containers on hangers and hung from rails during transit, reducing the handling required for the garments.
Gate: A movable barrier usually on hinges, serving as a door used for regulating the passage of water.
Gateway 1. A point at which cargo is interchanged between carriers or modes of transport.2. A means of access, an en4ry.
GATF General Agreements on Tariffs and Trade
GDP Gross Domestic Product: The total value of goods and services produced by a nation over a given period, usually 1 year.
GDP plus the net income accruing from foreign sources.
GEAR A general term for ropes, blocks, tackle and other equipment.
GEAR - A general term for ropes, blocks, tackle and other equipment. A general term for ropes, blocks, tackle and other equipment.
General Agreement on Tariffs and Trade Major international agreement on trade and tariffs between many nations all over the world. The discussions are now held by the WTO.
General Average Intentional act or sacrifice which is carried out to safeguard vessel and cargo. When a vessel is in danger, the master has the right to sacrifice property and/or to incur reasonable expenditure. Measures taken for the sole benefit of any particular inter
General Average Act (York-Antwerp Rules) There is a general average act when, and only when any extraordinary sacrifice or expenditure is intentionally and reasonably made or incurred for the common safety for the purpose of preserving from peril the property involved in a common maritime advent
General Average Statement This shows in detail all general average costs and expenses and the contribution of each interest in the general average in proportion to its value.
GENERAL CARGO A non-bulk oil cargo composed of miscellaneous goods.
General Cargo 1. Cargo, consisting of goods, unpacked or packed, for example in cartons, crates, bags or bales, often palletised. General cargo can be shipped either in breakbulk or containerised.
General Cargo Rate The rate for the carriage of cargo other than a class rate or specific commodity rate (air cargo).
General Purpose Container A container used for the carriage of general cargo without any special requirements for the transport and or the conditioning of the goods.
Genoa A large jib that overlaps the mast.
Genoa jib A headsail that extends from bow to behind the mast
Gen-set Motor generator set as power source for, e.g., thermal containers.
Germanischer Lloyd German classification society.
GES ground earth station
GGALLEY - The kitchen area of a boat. The kitchen area of a boat.
GHz gigahertz
Gilliwatte: Name given to Captain's boat in 17th century.
Gimball a device that suspends a compass so that it remains level
Gimbals A system by which an object is suspended so that it remains horizontal as the boat heels
GIS Geographic Information System
Give way Start, move, etc.
GIVE-WAY VESSEL A term used to describe the vessel which must yield in meeting, crossing, or overtaking situations.
GL Germanischer Lloyd (classification society)
GLA General Lighthouse Authority
Global Positioning System GPS for short. A system of satellites that allows one's position to be calculated with great accuracy by the use of an electronic receiver.
Glonass Global navigation satellite system
Glory Hole: Any small enclosed space in which unwanted items are stowed when clearing up decks.
GMDSS global maritime distress and safety system
GMT Time measured in Greenwich Mean Time. Coordinated universal time is the new term. A time standard that is not affected by time zones or seasons.
GMT Greenwich mean time
GNP Gross National Product:
Go about To turn the boat head-to-wind so as to go about on the opposite tack
Gob Line: Back rope of a martingale. 2. A length of rope used in a tug to bowse in the towrope. Gog rope.
GOC general operators' certificate with regard to GMDSS
Godown A warehouse or cargo shed. This term is often used in the Far East.
Gongoozler: The term given to none boating people who stand about, especially at locks just looking at what is happening.
Goods 1. Common term indicating movable property, merchandise or wares.
Goods Control Certificate Document issued by a competent body evidencing the quality of goods described therein, in accordance with national or international standards, or conforming to legislation in the importing country, or as specified in the contract.
Goods Flow The direction and path of the movement of goods and sequence of placement of those goods in a supply chain.
Goods in Transit The goods which have departed from the initial loading point and not yet arrived at the final unloading point.
Goods Item A separate identifiable quantity of products or articles of a single type.
Goods Receipt Document issued by a port, warehouse, shed, or terminal operator acknowledging receipt of goods specified therein on conditions stated or referred to in the document.
Gooseneck 1. Gooseneck shaped front end of a trailer or chassis.2. Recess front bottom of a container to reduce the total height of the chassis plus container.
Gooseneck The fitting on a mast by which the boom was attached
GOVERNMENT IMPELLED Cargo owned by or subsidized by the Federal Government.
GPS global positioning system
GRAB RAILS Hand-hold fittings mounted on cabin tops and sides for personal safety when moving around the boat.
great circle A circle drawn around the Earth such that the center of the circle is at the center of the Earth. Following such a circle plots the shortest distance between any two points on the surface of the Earth.
Great circle route A course that is the shortest distance between two points. the center of a great circle is the center of the earth.
GREAT LAKES PORTS Ports in the lakes of Canada and/or USA popular for grain shipments. In Canada: Port Arthur and Fort William in Lake Superior; Hamilton, Kingston, Toronto and Prescott in Lake Ontario. In USA: Chicago, Milwaukee in Lake Michigan; Duluth and Superior in La
GREAT LAKES SHIP Cargo ship developed to carry raw materials and manufactured goods on the Great Lakes. Most carry bulk cargoes of grain, iron ore or coal.
Green Equipment Availability The availability of environmentally friendly equipment for transport.
green water A solid mass of water coming aboard instead of just spray.
Greenwich Mean Time GMT for short. Coordinated universal time is the new term. A time standard that is not affected by time zones or seasons.
Greenwich Meridian Time (GMT) A time standard that is not affected by time zones or seasons. Now called Coordinated Universal Time (UTC).
Grid The parallel lines on a chart to which direction can be related
Grid Number An indication of the position of a container in a bay plan by means of a combination of page number, column and line. The page number often represents the bay number.
Grommet A ring or eyelet normally used to attach a line, such as on a sail.
Grommet a ring sewn into the sail through which a line can be passed.
GROSS FREIGHT Freight money collected or to be collected without calculating the expenses relating to the running cost of the ship for the voyage undertaken.
Gross Manifest A manifest containing freight details without any appropriate disbursements.
GROSS REGISTERED TONS A common measurement of the internal volume of a ship with certain spaces excluded. One ton equals 100 cubic feet; the total of all the enclosed spaces within a ship expressed in tons each of which is equivalent to 100 cubic feet.
Gross Tonnage The measure of the overall size of a vessel determined in accordance with the provisions of the international convention on measurement of vessels usually expressed in register ton.
Gross Weight 1. Weight (mass) of goods including packing, but excluding the carrier's equipment expressed in whole kilograms.2. The weight of a shipment including materials necessary for blocking etc. (air cargo).
Gross Weight of Container Total weight of container including cargo (in kilograms).
Ground paddle: A sluice built in the side wall of a lock instead of the gate.
ground swell A broad, deep undulation of water caused by an often distant gale.
ground swells Swells that become shorter and steeper as they approach the shore due to shallow water.
ground tacke The anchor and its rode or chain and any other gear used to hold a boat securely in place.
Ground tackle Generic term for anchoring equipment
Groundage Charge for permission to anchor.
GROUNDING Deliberate contact by a ship with the bottom while she is moored or anchored as a result of the water level dropping.
Groupage The collection of several small consignments and the formation of one large shipment thereof (road cargo).
Groupage Centre A location where groupage activities take place (road-cargo).
Growler: Small iceberg that has broken away from a larger berg.
GRP Glass Reinforced Polyester. Commonly called fiberglass, a material used for boat construction.
GRP Glass Reinforced Plastic
GS ground speed
gt gross ton
GT gross tonnage
Guarantee for customs An enforceable legal instrument with which a customs administration can recover duties and taxes which become payable in the event of irregularities during a transit movement.
Gudgeon A socket the pintle (pin or bolt used as a pivot) of the rudder sits in.
Guillotine gate: A lock gate that lifts upwards instead of swinging sideways to allow passage beneath.
Gunlayers Men with handspikes used to physically move guns for aiming.
gunnel, gunwale Pronounced "gun-nel." The rail around the edge of a boat. Smaller versions are called toe rails.
Gunroom Warrant officers and Midshipmen living quarters.
gunwale The upper edge of the side of a boat. Also spelled gunnel.
Gunwhale, gunn'l Top surface of a hull or boat, above the side members above the deck.
gusset A brace, usually triangular, for reinforcing a corner or angle in the framework of a structure.
Gybe Same as jibe.
Gypsy A windlass or capstan drum.
Gyro: A device used for navigating that points to true north. (See also Compass)