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 brief examination, a peek or glance.
An audition attended by an actor or model so that they can be visually appraised.
I’ve had a look-see at your work, and I think you’ve done a pretty good job of things.
A person who serves as lookout or scout.
To make a quick inspection, especially as a lookout or scout.