Mmmmm ...
As per Nigel ... but my experience is the middle east where the field work we did was in a field with 320+ platforms and on average 5-8 rigs or work barges as well ....
We very quickly sorted an SOP to stop the 'wrong deck landing syndrome'.
ALL of the decks we operated to were marked .... but having said that GPS helps immeasurably !!!
I had a personal routine that had me overfly the platform ...ID it ... and then fly a modified 80/260 course reversal procedure which depending on the local wind, would set me up on finals at the correct height and with a decreasing Airspeed ready for the 'mark 1 eyeball ... constant angle decreasing airspeed approach' .... it used to work like a dream for me ... and we used to regularly do 55-60+ approaches and landings per work day!
The only time it wanted to go wrong was if the Wx was a bit 'iffy' and we tried to cheat by not overflying ... 'straight in' approaches 'will bite you in the ass' eventually
Cheers
