ExtendedFlightOverWater

urn:aero:airm:1.0.0:ConceptualModel:Subjects:Flight:ExtendedFlightOverWater

A flight operated over water at a distance of more than 93 km (50 NM), or 30 minutes at normal cruising speed, whichever is the lesser, away from land suitable for making an emergency landing.

Source: ICAO Annex 6,