Camp Fredie, it was the main accident that led to the mandating of AVAD on offshore flights.
JAR-OPS 3.660 Radio Altimeters
(a) An operator shall not operate a helicopter
on a flight over water;
(1) when operating out of sight of the
land; or
(2) when the visibility is less than
1 500 m; or
(3) at night; or
(4) at a distance from landcorresponding to more than 3 minutes at normal cruising speed,
unless that helicopter is equipped with a radio
altimeter with an audio voice warning, or other
means acceptable to the Authority, operating
below a preset height and a visual warning
capable of operating at a height selectable by the