A geographical position determined by visual reference to the surface, referencing to one or more radio navigation aids, celestial plotting, or other navigation device. … [Read more...]

The distance the waves have been driven by a wind blowing in a constant direction, without obstruction. … [Read more...]

Canvas, wood or rope used over the side to protect a vessel from chafing when alongside another vessel or a dock. … [Read more...]

Six feet. Comes from the Dutch word "fadom" which was the distance between fingertips of outstretched hands. … [Read more...]

Distress alert received from any source, including communications equipment intended for alerting, when no distress situation actually exists, and a notification of distress should not have resulted. … [Read more...]

Distress alert initiated for other than an appropriate test, by communications equipment intended for alerting, when no distress situation actually exists. … [Read more...]

Mandatory speed in a fairway … [Read more...]

Navigable part of a waterway … [Read more...]

is a state which occurs when a mass of granular material is saturated with liquid to such an extent that it loses its internal shear strength and behaves as if the whole mass was in liquid form.  … [Read more...]

is that percentage of moisture content, when a flow state develops. … [Read more...]