Obstruction
An object that a boat could not pass without changing course substantially, if she were sailing directly toward it and one of her hull lengths from it.
obstruction
An object in or near the water requiring a boat to make a major course alteration to pass to one side.
ocean race, offshore race, long-distance race, distance race ...
Inland Waters Obstruction Markers are white with black vertical stripes and indicate an obstruction to navigation. You should not pass between these buoys and the nearest shore.
Marker of rocks, obstruction, edge of safe chanel etc.
Bustle
A hydrodynamic shape attached to the chine that increases the area available for buoyancy.
It affords safe passage over the pipelines and other deck obstructions.
Caulking/Calking - Forcing material into the seams of the planks in a boat's deck or sides to make them watertight; the material itself.
Close aboard is close to another ship or an obstruction ABREAST alongside of; on the beam ACOUSTIC WIRE same as hydro wire but with electrical conductors built in ADCP Acoustic Doppler Current Profiler AFT toward the stern; ...
Baggywrinkle - A soft covering for cables (or any other obstructions) that prevents sail chafing from occurring.
Bank (sea floor) - A large area of elevated sea floor ...
Adjustable metal fittings that attach stays to the hull channel The deeper portion of a water area, which may be marked with buoys that guide boats safely through shoals, shallow areas or other underwater obstructions Charlie Noble The pipe ...
In areas without obstructions the wind and seas can build to great strength, but in areas such as sheltered coves and harbors the wind and seas can be quite calm. Flotsam Debris floating on the water surface.
casting platformElevated deck clear of obstruction used by anglers to make casts, often equipped with pedestal chairs. catamaranA twin hulled boat, either power or sail.
Usually employed as a fair lead around obstructions. BLOWER A mechanical device used to supply air under low pressure for artificial ventilation and forced draft, usually of the centrifugal type. BOARDING The act of going on board a ship.
The screw propeller was found preferable in such cases, as it offered less obstruction than paddle wheels when the sails were set and the engines stationary; ...
(Rule 30)
3) Making way with sails up and motor on - Inverted cone ( only required for sailboats, 12 meters or larger ).
4) Dredging or making way with an obstruction on one side - Two round green lights in a vertical line to indicate the side safe ...
Next, if two boats are either on the same tack or "about to pass" (or passing) a mark or obstruction (so Rule 18 applies) then to determine whether they are "overlapped" you must decide whether they satisfy the "physical test" of overlap.
There may be obstructions within the traffic separation scheme. Efforts, however, are made to keep the lanes clear. For known obstructions, such as an oil rig or wreck, within a traffic separation scheme, notice to mariners will be given.
If due to the presence of obstructions the sound field of a single whistle or one of the whistles referred to in paragraph l(f) above is likely to have a zone of greatly reduced signal level, ...
The FCC has set aside 14 frequencies for FRS units, most of which operate on a half watt of power and can communicate up to two miles without significant obstructions.
FAIRLEAD A fitting for leading a rope over an obstruction to avoid friction.
Fairway Shipping channel, normally the center of an approach channel.
Fathom Nautical measurement of depth of six feet or 1.83m.
Aboard:
On or in a vessel. Close aboard is close to another ship or an obstruction
About:
Across the wind in relation to the bow. When a sailboat tacks across the wind to bring it from one side to the other, she is said to go about.
Lighthouses and lightships are clearly marked, and shoals, rocks and other obstructions to navigation are plainly defined. All the marginal notes on the charts should be made familiar by the navigator.
Beacon- A light, or other naviga-tion aid, usually on land, to warn boats of danger or obstruction.
Beam-The width of a boat at its widest point.
Beam sea- Waves running at right angles to the boat's corse.
Remember, when the tide turns, the yacht will swing around, so make sure that you are clear of obstructions. Once anchoring is completed, check that you are not dragging, by taking two fixes on the shore and watching for the next hour.
Hazardous Waters - Unusual water hazards such as rips, breakers, bars, shoals, rapids and obstructions.
Hull Construction - That material which constitutes the majority of the shell of the vessel.
Pilot: A trained captain in the employ of a Harbourmaster who's job is to guide vessels into harbours, past underwater obstructions.
Punt: A small square ended rowing vessel.
Quarterdeck: The rear part of the uppermost deck on a ship.
CATWALK - A raised bridge running fore and aft from the midship, and also called "walkway". It affords safe passage over the pipelines and other deck obstructions.
CBF- Cubic feet
CBM- Cubic metres ...
The decks are very clear of obstructions and pad eyes on deck are folding to make them less obtrusive. The 'bathing platform' aft is operated hydraulically. There is tankage for 450 gallons of fuel and 436 gallons of water.
They are provided to help the operator of a pleasure craft determine position and course. They can additionally warn the operator of dangers or obstructions and advise the operator of the location of the best or preferred route.
Traditionally, when sailors hollystoned the decks, if they encountered an obstruction placed on deck (an officer's personal effects perhaps) they would scrub round it.
 See also: Boat, Forward, Line, Anchor, Deck
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