Mmmmm ....
Wrong deck landings should NOT be a problem ... somewhere a 'wrong' SOP or more likely 'NO' SOP for a/c arrivals is being utilised.
Most (?) operations require that the a/c captain gets a 'permission' to land from the Rig radio room at least :10 prior to arrival ... with a 'green deck' confirmation from the HLO prior to a landing to confirm the deck is clear and the fire guards are in place ...
No landings should be contemplated until those permissions are in place ....
From my experience ALL offshore landing areas are/should be identified by Hi Vis painted names or identifying numbers so that heli crews and or boat crews get to the right place ... it is sometimes necessary to overfly the destination deck in order to correctly ID the rig/platform ... and that process should be part of the SOP.
If there is a problem with correct platform identification (perhaps because of so many rigs/ decks in the local area) it can be easily solved a variety of ways ... either by confirmation that the heli is approaching the correct place (by radio from the HLO) or perhaps by light signal from the deck. The most accurate way is by the overflight method which uses the very hi-tch Mk1 eyeball for positional confirmation.
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