A fact known from direct observation.
A premise from which conclusions are drawn.
A floating reference point, or SLDMB, used to evaluate surface currents in a body of water. Often employed by coastal search and rescue.
A fixed reference point or set of reference points which precisely define a system of measurement or a coordinate system.
To provide missing data points by using a mathematical model to extrapolate values that are outside the range of a measuring device.
A subject for observation; a prospect or view.
A session of watching for an approaching enemy, police, etc.
A person on watch for approaching enemy, police, danger, etc.
A vantage point with a view of the surrounding area.
A joist that extends in cantilever out from the exterior wall (or wall plate) of a building, supporting the roof sheathing and providing a nailing surface for the fascia boards.
An observation window.
One's perspective, outlook; hence, one's responsibility. (used with a possessive pronoun or a noun in a possessive form).