Final Answer:
In regards to weather, the acronym BMNT stands for "Begin Morning Nautical Twilight," and EENT stands for "End Evening Nautical Twilight."
Step-by-step explanation:
In meteorology, the terms BMNT and EENT are associated with nautical twilight, which refers to the periods before sunrise and after sunset when the horizon is still visible at sea. BMNT, or "Begin Morning Nautical Twilight," marks the start of nautical dawn, signaling the beginning of the morning twilight. It is the time when the center of the sun is 12 degrees below the horizon.
Conversely, EENT, or "End Evening Nautical Twilight," marks the conclusion of the evening twilight when the sun is 12 degrees below the horizon, and darkness gradually takes over. These terms are essential in aviation, navigation, and other fields that rely on precise time measurements during low-light conditions.