RADAR PLOTTING SYMBOLS AND THERE MEANING

Symbols are signs, letters, or abbreviations used to replace words. They are used in mathematics and certain sciences to good advantage by reducing the amount of space required to explain a thing. Since symbols take the place of words and, they form a language of there own her here is a list that is used in Radar Plotting.

CPA - Closest Point of Approach.

DRM - Direction of relative movement, DRM is always in the directon of MI-M2-M3.

e - The origin of own ship's vector (e-r), also the origin of contact's vector (e-m).

e-m - Contact's vector (Contact's true course and the distance contact actually travels).

e-r - Own ship's initial vector (Own ship's true course and the distance own ship actually travels).

e-r' - Own ship's final vector (Own ship's final course and the distance own ship actually travels on the final course).

OC - Own ship's initial course.

m - The head of the relative motion vector (r-m) also the head of the contact's vector (e-m).

M1 - First plotted position of contact.

M2,M3 - Later plotted positions of contact Point of execution; position of contact on.

RML at planned time of own ship's maneuver.

NRML - New Relative Motion Line the Relative Motion Line after own ship has maneuvered.

NRM&RL - New Relative Motion and Reference Line, New Relative Motion Line advanced to the point "m".

r - The head of own ship vector (e-r).

r' - The head of final own ship vector (e-r') the head of own ship vector after course and/or speed change.

r-m - The relative motion vector.

RML - Relative Motion Line.

SRM - Speed of Relative Movement.