Meaning of danger angle

dan'ger an"gle

Pronunciation: [key]
— Navig. Navig.
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.