trough - The bottom of a wave, the valley between the crests.
truck - A cap for the top of the mast.
trough - Rope used to cant a spar, as trip halyards for a topsail, or the line bent to the crown of an anchor to trip it or break it out of the ground.
TROUGH-The valley between the peaks of successive waves.
TRYSAIL-Small storm sail set in lieu of the mainsail.
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Trough
An elongated area of low pressure, often associated with a wind shift and showery weather.
Trowal ...
Trough - Bottom section of a wave
True Bearing - Bearing or direction taken relative to true North
True Speed or Speed Made Good (SMG) - Actual speed which includes effect of current ...
Drifting in the trough of a heavy sea (Figs. 75 and 76), use oil from waste pipes forward and bags on weather side, as in Fig. 72.
Sagging - When a trough of a wave is amidship, causing the hull to deflect so that the ends of the keel ar higher than the middle. The opposite to hogging.
They heave to under a close-reefed maintopsail, never under a lower course, and the ship when in the trough of the sea has enough sail exposed to keep her steady. The smart schooners that used to ply between St.
B and in trough (bunkers full), and a cargo vessel on wave crest (hold and bunkers empty) and in trough (hold and bunkers full). From these curves it is seen that the maxi mum bending moment occurs near amidships; its effect in figs.
There are two troughs tooled into this sunken flat that are conveniently located to hold the spinnaker pole. The side decks are contoured so that you will be as comfortable hiking as you will be sitting on the cockpit seat.
The distance that the trough of a wave is below the average water level. With large waves in shallow water the scend is important to help determine whether a boat will run aground.
schooner ...
The time from tidal height to trough was 7 hours, we crossed 2.25 hours or 4/12 into the tidal ebbing. This is in the period of maximum tidal water flow. See Tidal Height Page ...
Watch for the words "Tropical wave", "Tropical disturbance", and "Upper level troughs".
In poor weather, the length of the tow line depends on the waves. To avoid collision, synchronize the speed of the two boats and their movement over the crest or trough of the waves.
PITCHING The alternate rising and falling motion of a vessel's bow in a nearly vertical plane as she meets the crests and troughs of the waves.
 See also: Boat, Sailing, Wind, High, Point
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