morningNauticalTwilight property

Twilight morningNauticalTwilight

The morning nautical twilight.

The nautical twilight is when the centre of the Sun is between 6° and 12° below the sensible horizon. It may now be possible to discern the sea horizon and it is no longer dark for normal practical purposes.

Implementation

Twilight get morningNauticalTwilight => _morningNauticalTwilight ??= Twilight(
      SunriseSunsetCalculator(instant, latitude, longitude,
              sunZenithDistance: 102.0)
          .calculateSunrise(),
      SunriseSunsetCalculator(instant, latitude, longitude,
              sunZenithDistance: 96.0)
          .calculateSunrise(),
    );