COMPASS: Instrument for finding directions.
COMPASS CARD: Part of a compass, the card is graduated in degrees, to conform with the magnetic meridian-referenced direction system inscribed with direction which remains constant; the vessel turns, ...
Compass: An instrument that uses the earth's magnetic field to point to the direction of the magnetic North Pole; used by navigators to determine the direction a yacht is heading and to set a course.
Course: The direction a yacht is sailing.
compass rose - 1 - A circle on a chartchart indicating the direction of geographic north and sometimes also magnetic north. Charts usually have more that one compass rose.
COMPASS CARD: Part of a compass; the circular card graduated in degrees. It is attached to the compass needles and conforms with the magnet meridian-referenced direction system inscribed with direction. The vessel turns not the card.
compass error
Magnetic deviation. The difference between the reading of a compass and the actual magnetic course or bearing due to errors in the compass reading.
Compass CardPart of a compass, the card is graduated in degrees, to conform with the magnetic meridian-referenced direction system inscribed with direction which remains constant; the vessel turns, not the card.
Compass
Navigation instrument, either magnetic (showing magnetic north) or gyroscopic (showing true north)
Course ...
compass - A navigational device; boating instrument that provides 360 degrees of direction; also a plotting tool for drawing circular arcs and circles.
compass bowl - The bowl within the binnacle containing the compass.
Compass Card :
A card labeling the 360° of the circle and the named directions such as north, south, east and west. Part of a compass, the circular card is graduated in degrees.
THE COMPASS
I HAVE no space in this volume to write an exhaustive chapter on navigation. It is, however, an art easily acquired, and may be wholly self-taught.
compass
A device indicating directions and bearings in compass degrees, of which there are 360, from north through east to south and through west back to north.
Compass Rose - Double circle with magnetic degrees in the inner circle and true degrees in the outer circle
Compensated Compass - Compass that has been adjusted to correct for deviation ...
a compass direction from one point to another
Belay
to make secure, but can also mean to halt or cease, as in "Belay that, sailor!" ...
There is a compass in the shore box, which can be mounted on the after cabin wall, starboard side. Be sure to tumble the compass on its gimbals so that the Lubber Line (etched line that shows the straight-ahead direction) on the compass shows aft.
A magnetic compass can be used to help the operator of a pleasure craft find directions. It must be remembered however that a magnetic compass is influenced by the proximity of metallic and/or electrical devices.
With a hand compass and the boat's distance speedometer, it is pretty simple to evaluate precisely the distance of a fixed object. It is a simple geometric method based on the isosceles triangle principle.
Right Angle Method (see illustration) ...
The taking of compass bearings is one of the most important means of determining risk of collision. The technique depends on good visibility, on the vessel being tracked maintaining a constant course, and on several observations.
variation
Compass variable that accounts for the difference in degrees between true north and magnetic north.
ventilation
Air introduced into a spinning propeller from the water's surface.
Heading - The compass direction in which a vessel is pointed at any given moment.
Head sea - Waves coming from the direction in which a vessel is heading.
Deviation: Compass error caused magnetic disturbance
Dockline: A line used to secure a boat to a dock.
Draft: Water depth required to float the vessel.
Deviation- Compass error caused by local magnetic attraction.
Dinghy- A small boat fitted with oars and sometimes sails.
Dismast- To remove a mast or masts. To lose a mast or masts at sea.
Divisions of a compass which has 32 points.
Point High
To sail very close to the wind.
Gyrocompass - A compass having one or more gyroscopes as the directive element, and which is north-seeking. Its operation depends upon four natural phenomena: gyroscopic inertia, gyroscopic precession, the earth's rotation, and gravity.
COMPASS - Instrument using the earth's magneting field to point to the direction to the magnetic north pole.
COURSE - The direction in which a boat is steered.
CROWN - Bottom part of anchor.
CUDDY - A small shelter cabin in a boat.
Bearing - a compass direction from one point to another
Belay - to make secure
Bight - a loop of line or rope ...
Azimuth compass - An instrument employed for ascertaining position of the sun with respect to magnetic north. The azimuth of an object is its bearing from the observer measured as an angle clockwise from true north.
The stand for the compass by which the vessel is steered
Boom
A fore and aft spar extending from a mast to stretch or extend a sail ...
The mount for the compass, usually located on the wheel's pedestal.
binocular
A pair of small telescopes, one for each eye, used to magnify distant objects.
The Points of the Compass
~ The Thirty-Two Points of the Compass, illustrated.
Navigation
~ Understanding Navigation, for writers and readers. The Points of Sail and Ship's Headings.
Cardinal Points - The compass points of North, East, South and West. Intercardinal or half-cardinal points are Southeast, Southwest, Northwest and Northeast
Careen - To list a vessel so that a large part of her bottom is above water.
" Binnacle The mount for the compass, usually located on the wheel's pedestal. Bitt A sturdy post mounted on the bow or stern to which anchor or mooring lines may be attached. Bitter end The end of a line.
BINNACLE A stand or case for housing a compass so that it may be conveniently consulted. Binnacles differ in shape and size according to where used and the size of the compass to be accommodated.
Binnacle A support for the compass, raising it to a convenient position.
Board boat A small boat, usually mono rig. May have a shallow cockpit well. Typically has almost no freeboard.
To command a ship and its crew cardinal mark A navigation aid used in the Uniform State Waterway Marking System that is color-coded to indicate the compass direction around which it should be passed.
AMIDSHIPS midway between bow and stern, in the line of the keel ASTERN toward the rear of the vessel; behind the vessel; backward progress ATHWARTSHIP at right angles to the fore and aft line BEAM the greatest width of a vessel BEARING the compass ...
Cardinal points- The points of North, South, East and West as marked on a compass rose.
Carlins- Structural pieces running fore and aft between the beams.
Carrick bend- A knot used to tie two lines together.
COMPASS ERROR - Combined effect of variation and deviation.
COURSE - Intended direction for a boat to be steered.
DECK - Horizontal covering resting on the deck beams of a vessel, the floor of any compartment.
Binnacle A wooden case or box, which contained compasses, log-glasses, watch-glasses and lights to show the compass at night.
Bitter end - the final inboard end of chain or line
Bitt - A vertically posted above deck used to secure line.
cardinal mark: a navigation aid-used in the Uniform State Waterway Marking System-that is color-coded to indicate the compass direction around which it should be passed.
Rhumb line - A line on a sphere that cuts all meridians at the same angle; the path taken by a ship or plane that maintains a constant compass direction (straight line compass course between two points)
Rigging - The ropes, chains, etc.
To find true north using a magnetic compass (one of the Four Great Inventions of ancient China, circa 300 A.D.), the local deviation (also called magnetic declination) must be known to adjust the reading.
In scientific expeditions to the Polar regions, it is of the highest importance to avoid any disturbance of the compass, and this can be ensured by constructing the vessel of wood, with metal fastenings.
The principal entries are: courses steered; distance run; compass variations, sea and weather conditions; ship's position, principal headlands passed; names of lookouts, and any unusual position, principal headlands passed; names of lookouts, ...
BINNACLE A short pillar near the helm on which is mounted the ship's compass. BITTER END The last part of a rope or chain. The inboard end of the anchor rode. BLOCK A wood or metal pulley with sheaves or wheels through which the ropes are rove.
The pedestal supports the wheel, a binnacle compass, throttle control lever and an instrumentation panel that includes a Raymarine C80 color chartplotter and multifunction graphic display.
Wristwatch and compass. The watch will help you to know when you should return for home and the compass will help you if an unexpected fog rolls in. Make sure you know where you are at all times.
" The phrase "on a close-hauled course" means the compass course you would be heading if you were sailing close-hauled at full speed with sails full and drawing.
deviationThe amount of error from displaying magnetic north in a boat's compass caused by the boat's own magnetic interference.
This is the formula for converting compass headings back to true ones: Compass plus Deviation equals Magnetic heading. Beyond that, add the Variation to get the True heading.
Binnacle: Device holding and stabilizing a compass
Bitter End: The "end" of a rope, to part that stays on board, for example of the anchor rode ...
such risk shall be deemed to exist if the compass bearing of an approaching vessel does not appreciably change; ...
Always approach a new harbor on a compass heading. It is easy to misjudge distances and enter at an angle or too close to a shoal. The shoal at the harbor entrance is not seen on charts with a scale of 1:80,000.
They place a collapsible sailing rig and simple navigational equipment (a plastic sextant, a compass, a calibrated quartz watch and a nautical almanac) in the dinghy. The rig should include a mainsail that can be reefed for storms, and a sea-anchor.
Magnetic North: The direction a compass needle points when there are no local disturbing influences [deviation].
Mainsail: The sail hoisted on the after side of the mainmast, pronounced "mains'l."
Make Fast: Action of attaching a line.
Coastal navigation using both GPS and compass
Charter boat operation
Preparing for live aboard life
Outboard motor tuning and maintenance
Advanced docking
Racing school
Catalina tune up clinic
Children's summer sailing camp program
Multihull sailing ...
Lubber Line - A mark or permanent line on a compass indicating the direction forward parallel to the keel when properly installed
Luff - The forward edge of a triangular sail. In a mainsail the luff is that portion that is closest to the mast.
Bearing Direction of an object express in Compass notation.
Bear away To put the helm up, i.e. keep further away from the wind.
Beating Sailing towards the direction of the wind by tacking.
You will need a plotter, dividers and drawing compasses. Most people find two-handed dividers easier to use. If you find an academic course on plotting it might be best to take it so your skills will be topnotch before you charter a boat.
A direction an object is relative to the observer (based on the compass heading).
Block
A pulley - a nautical term. Often with more than one wheel (sheave being the proper name) to increase its mechanical advantage.
Aclinic line - An imaginary line on a chart showing locations where there is no dip to a magnetic compass, ie where a vertically mounted magnetic compass will point to the horizon.
 See also: Boat, Point, Wind, Line, Sailing
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