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Radar

Boating RabbetRadar arch

radar reflector - An object designed to increase the radio reflectivity of a boat so that it is more visible on radar. Many small boats are made with fiberglass and other materials that do not reflect radar very well on their own.

 


radar
Electronic device using high frequency radio waves to detect objects and display their positions on a monitor.

Radar
An electronic instrument that uses radio waves to find the distance and location of other objects. Used to avoid collisions, particularly in times of poor visibility.

Radar - Used for navigating, direction-finding, locating positions, and ship traffic control.

RADAR - An electronic system that measures distance by reflecting radio waves on objects.
RADAR arch - Arch-shaped supporting structure for radar, usually found on large motoryachts.

Passive Radar Reflector:
Pleasure craft that are under 20 metres in length or a craft which is constructed primarily of non-metallic materials (wood or fiberglass), must be equipped with a passive radar reflector.

Radar has assumed such importance on modern vessels that Rule 6 (Safe Speed) and Rule 7 (Risk of Collision) discuss it specifically.

RADAR REFLECTOR-Metallic contrivance which reflects radar beams.
REACH-Points of sailing between running and pointing close-hauled. Close reach, sailing nearly close-hauled. Beam reach, sailing with the wind abeam.

Radar - Can be seen 20% beyond the horizon. Not useful in the rain
Radiation Fog - Cooler land mass causes fog over land ...

arch, radar arch
A frame over a cockpit, bridge, or deck on which antennas, radars and radar reflectors, solar panels, lights, awnings, horns, and other items are mounted out of the way of the crew.
around the buoys ...

Rack - The operation of temporarily holding two lines together by seizing.
Radar - Radio Detection and Ranging. An electronic instrument that uses radio waves to find the distance and beari ...

RACON RAdar beaCONs
Radar signature of beacons and buoys for easy identification on the radar PPI. Most of them work on 3 and 10 cm, and if not they cannot be detected.

Radar - Acronym for RAdio Detection And Ranging. An electronic system designed to transmit radio signals and receive reflected images of those signals from a "target" in order to determine the bearing and distance to the "target".

gain control: a device installed on marine radio receivers to improve the clarity of radio signals; also, used for the same purpose on radar sets. gale: a range of winds from 28 to 47 knots. galley: a boat's kitchen.

radar, ECDIS, chart plotter, etc.) with overlaid electronic chart data that includes a mark for every significant ship within radio range; each as desired with a velocity vector (indicating speed and heading).

(b) Additionally, by vessels with operational radar:
the characteristics, efficiency and limitations of the radar equipment;
any constraints imposed by the radar range scale in use; ...

*While GPS systems will give you a location where satellites think you are, radar will pinpoint your accuracy completely, including if you are close to other vessels and any misjudged shorelines.

Also, a transmitted radio, sonar or radar signal. bear offTo turn away from the wind. bearingDirection to an object. beatingSailing upwind. berthA place to sleep aboard a boat. Also, a boat slip.

A Raymarine autopilot, chartplotter and radar are standard. Tactick wireless sailing instruments are also part of the standard package. The systems are well thought out.

You must have taken a fire-fighting course (5 days at SeaSchool), a radar course (5 days at SeaSchool), and meet AB Seaman qualifications (3 days at SeaSchool).

Rodney and Sheffield first to use air-warning radar at sea.
April 9, 1940
Rodney damaged by German aircraft off Karmo Island, West of Bergen.

RACON Beacon giving characteristic signal when triggered by ship's radar set.
Rake The inclination of the mast in the fore and aft line from the vertical.

MAST: Any vertical spar provided to support sails or equipment such as radar antennae, etc.
NAUTICAL MILE: 1.151 statute mile.

US Power Squadron Booklets (Knots, Sailing, GPS, Radar, etc.)

US Coast Guard Auxiliary's Skipper's Safe Boating Course ...

beam
Measurement of a boat at its widest point. Also, a transmitted radio, sonar or radar signal.
bearing
Direction to an object.

The direction of an object (vessel, buoy, etc.) from an observer; bearings can be visual, or by radio or radar.
Below
Beneath the deck.

Commercial vessels will appear to be traveling slower than they actually are and thus should be given a wide berth. A radar reflector should be hoisted so commercial ships can more easily detect your craft.

Only seen on tugs and icebreaking vessels, sometimes used to reduce topside weight, and for reducing radar cross sections.
Flare: The outward curvature of the hull surface above the waterline, i.e., the opposite of tumblehome.

Aids such as radar, echo-sounding and autopilot are common. This means that the auxiliary engine now also performs the vital function of powering an alternator to provide electrical power and to recharge the yacht's batteries.

In low visibility foghorns are used and smaller craft have reflectors mounted so they can be seen by larger radar-equipped vessels.

Crows detest large expanses of water and head, as straight as a crow flies, towards the nearest land if released at sea - very useful if you were unsure of the nearest land when sailing in foggy UK waters before the days of radar.

Radar. Essential for navigation at night when near land, or in shipping areas, or of course in fog. Also a tremendous assist when approaching an unfamiliar harbour with a hard-to-find entrance, or entering or leaving an anchorage at night.

Radar Radio detection and ranging. An electronic instrument that uses radio waves to find the distance and location of other objects. Used to avoid collisions, particularly in times of poor visibility.

See also: Sailing, Light, Boat, Point, After