doubling the angle on the bow

doubling the angle on the bow

[′dəb·liŋthə ′aŋ·gəl ȯnthə ′bau̇]
(navigation)
A method of obtaining a running fix by measuring the distance a craft travels while the relative bearing (right or left) of a fixed object doubles; the distance from the object at the time of the second bearing is equal to the run between bearings, neglecting drift.