Nautical Dawn or Morning Nautical Twilight refers to the moment where the geometric center of the Sun will be 12 degrees below the horizon during the morning. It is nothing but early morning time. Nautical Dawn is preceded by the astronomical twilight. Use our online BMNT calculator to find Begin Morning Nautical Twilight value by providing the Date, Latitude, Longitude and GMT time. The times of sunrise is included and it is adjusted to reflect the UTC offset of the user's clock.
Nautical twilight is calculated for both EENT (End Evening Nautical Twilight) and BMNT (Begin Morning Nautical Twilight). Here BMNT calculator calculates you with the Nautical dawn based on the input fields of date, latitude, longitude and GMT time.