depth sounder
Electronic sonar device that displays water depth.
deviation
The amount of error from displaying magnetic north in a boat's compass caused by the boat's own magnetic interference.
depth sounder - An instrument that uses sound waves to measure the distance to the bottom.
deviation - See magnetic deviation or compass error.
Depth Sounder - An instrument that determines the depth of water by measuring the time interval between the emissions of a sound and the return of its echo from the bottom.
depth sounder - An electronic device for measuring water depth; it measures the time lapse from sending a sound wave to the bottom and its return back; the results may be displayed in fathoms, feet or meters.
Understand how your depth sounder shows the depth. Before leaving, ask the briefer if the marked depth is the depth under the keel or under the hull. If the latter, add the height of the keel to find out your depth clearance.
Deckhead The underside of the deck, viewed from below (the ceiling.) Depth sounder An instrument that uses sound waves to measure the distance to the seafloor. Displacement speed Also hull speed.
chart recorderAn electronic depth sounder that records bottom structure data on paper. chartsPaper or electronic navigation maps. chinePortion of the hull where the bottom and sides intersect (can be rounded or angled).
Using a depth sounder or echo sounder can help you approach a lighthouse, marking the way to a harbor. You can use chart depths to intersect a bearing line and give yourself a fix.
Wind instruments (vane and speed) and depth sounder. Depth sounder essential, wind instruments very helpful.
Bug screens on portholes, hatches and dorades. Let the air in, and keep the buggers out.
An electrical fish finder or depth sounder that uses sound echoes to locate the depth of objects in water. It does so by timing the sound pulses.
eddy
Water or air currents flowing in circular patterns.
DECK- Horizontal topmost floor of the vessel.
DEPTH SOUNDER- Instrument that uses sound waves to measure the distance of the bottom.
DINGHY- A small open boat. A dinghy is often used as a tender for a larger craft.
Deck
The surface on the top of a boat on which people can stand. depth sounder An instrument that uses sound waves to measure the distance to the bottom.
2 Drill a hole the diameter and depth of the transducer lobe in the widest part of the pear shape using a bench drill. Now drill into the centre of this hole the same diameter as the threaded bolt position of the depth sounder.
be free to safely maneuver it is not a good practice to sound with cable suspended equipment unless the boat is stationary at anchor or attached to a tagline. If the boat is underway depths should be determined using an acoustical depth sounder unit ...
NAVIGATIONAL AIDS: Material aboard your boat that will assist in navigating (compass, depth sounder, G.P.S., etc).
O
OAR: A device used for rowing a boat.
 See also: Sound, Boat, Point, Current, Deck
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