As we appear to be onto hypothetical helicopters now; for ultimate passenger safety, if a helicopter such as an S-64 Skycrane was used, and passengers travelled in a purpose-made detachable freefall lifeboat suspended underneath, then the hazards of passenger evacuation, risk of drowning/hypothermia, need for immersion suits/liferafts etc. would all be avoided.
Ha ha - - brilliant!
You've probably just come up with the safest offshore helicopter of all time. The "suspended" lifeboat could also have a parachute an fulfill the safety concern of someone earlier on who asked if there was a way to slow down helicopter descent in case of emergency!
Probe to compare UK safety record in North Sea with other countries
Statistics uncovered by the Sunday Herald show Norwegian and UK offshore helicopters had similar fatality rates between the 1960s and 1990s. But in the last decade, the UK's record has worsened while Norway's has greatly improved.
Probe to compare UK safety record in North Sea with other countries | Herald Scotland