Definition

A method consisting in sounding along the arcs of circles subtended by two objects whose POSITION is known. For each arc, an angle rema­ins constant (fixed angle) and the second angle, bet­ween another pair of objects, defines the POSITION of the vessel along the arc. By varying the fixed angle successively by equal amounts, a series of LINES OF SOUNDING covering the area systematically can be run. See FIXED ANGLE PLOT.