Absolutely serious
Pilonrock ,
The fear of the wrong deck landing and its consequences is probably due to the rig’s strict insurance policy and condition requirements. The rig’s Hull insurances are not valid if each fire fighting stations are not manned, as well as fire fighting system has not been fully pressurized for immediate fire fighting response.
If a helicopter lands on the wrong deck then immediate fire fighting and immediate rescue service does not exist. In this case, the rig’s Hull insurance coverage does not exist at all. This is the reason why this is almost larger issue than life thing. This is Underwriter’s mandatory requirement (fully established immediate fire fighting and rescue response).