GAFF - a free-swinging spar attached to the top of the sail.
GAFF-TOPSAIL - A light triangular or quadrilateral sail set over a gaff
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).
GALLEY - The kitchen area of a boat.
1. Ancient: Aspect of seafaring
associated with slavery
GALLOWS - A frame used to rest the boom when the sail is down.
PLANK - Board or ramp used as a walkway from ship to dock
GANGWAY - The area of a ship's side where people board and disembark.
Line used to secure a furled sail to the boom or yards.
GATHERING WAY - Increasing speed.
A general term for ropes, blocks, tackle and other equipment.
GENOA - Also known as a genny, usually the biggest jib on the boat Foresail over 100%.
GEOGRAPHIC POSITION GP of a celestial body is the position on the Earths surface where that celestial body is directly overhead at a stated moment, i.e. the point on the Earth where a straight line from the celestial body to the center of the Earth intersects the surface of the Earth.
GHA See Greenwich Hour Angle
- Movable mountings often found on shipboard lamps, compasses, etc., which
provide dieting passengers an opportunity to observe the true motions of the
ship in relation to them, and thus prevent any recently ingested food from
remaining in their digestive systems long enough to be
GIVE-WAY VESSEL - A term used to describe the vessel which must yield in meeting, crossing, or overtaking situations.
GMT - Greenwich Meridian Time, also known as Universal Time or Zulu Time
GOOSENECK - The fitting which secures the boom to the mast.
See Geographic Position
- global positioning system; is a satellite-based radio navigation used
to determine position
GRAB RAILS - Hand-hold fittings mounted on cabin tops and sides for personal safety when moving around the boat.
GRANNY KNOT - Failed unseamanlike attempt at a square knot
GRAPNEL A small anchor with several arms used for dragging purposes
GREAT CIRCLE A course plotted on the surface of the globe that is the shortest distance between two points
GREENWICH HOUR ANGLE ( The angular distance of a GP, West of the prime meridian, or the angular distance of the hour circle of a body West from the celestial meridian of Greenwich
GROUND To touch the bottom or shore
GROUND SWELLS - Swells that become shorter and steeper as they approach the shore due to shallow water.
GROUND TACKLE - A collective term for the anchor and its associated gear.
GROWLER - Small iceberg that has broken away from a larger berg.
GUDGEON - Socket part of hinge attaching rudder.
GUNWALE - The upper edge of a boat's sides.
GUSSET - A brace, usually triangular, for reinforcing a corner or angle in the framework of a structure.
GYBING - Change tack by putting stern through wind.
A directional instrument that indicates true north