AC that ARE NOT over water certified(liferafts and life jackets) can fly no further than 50NM from land.
AC that ARE overwater certified but NOT ETOPS can fly past 50NM from land but
CAN NOT fly more than 60mins at single engine cruise speed from a suitable airport....land or water.
AC that are ETOPS, are of cousre over water certified, and can fly up to the their ETOPS cert. (120mins,180mins,etc.) away from a suitable airport......land or water.
To clarify ETOPS is not over water but rather it is distance from a suitable airport.
Dl757md