danger angle

noun

, Navigation.

1. a horizontal or vertical angle, subtended by two points on shore, that provides a maximum or minimum angle between the points as observed from a vessel if it is to steer a safe course.

Word History and Origins

Origin of danger angle¹

First recorded in 1890–95

Example Sentences

Angle A is called the "horizontal danger angle."

From Project Gutenberg

One of the many interesting exercises that may be derived from this theorem is seen in the case of the "horizontal danger angle" observed by ships.

From Project Gutenberg

If a dangerous shoal A is near a headland H, the angle HAX is measured and is put down upon the charts as the "vertical danger angle."

From Project Gutenberg

Ships coming near the headland are careful to keep far enough away, say at S, so that the angle HSX shall be less than this danger angle.

From Project Gutenberg