What does BMNT stand for in military terms?

BMNT stands for "Begin Morning Nautical Twilight." This term is used in military operations to indicate the time when the horizon is sufficiently illuminated for navigation purposes, typically occurring just before dawn. Nautical twilight is important because it allows personnel to see the horizon clearly for navigational activities, which can be critical for military movements and operations conducted during low-light conditions. Understanding BMNT helps units plan their movements and operations around the available light, ensuring they can operate effectively while minimizing risks associated with visibility.