if the crane was there he would have hit it on approach BEFORE landing ....... the CAP437 notes are for ensuring clearance if manoeuvring on the helideck.
Yes, I know what the markings are for - thanks. But how many pilots are aware of how small the margins are when manoeuvring over the deck?
You may have your SOP 212man
Err no, not MY SOP/Technique at all!
Sorry but these are remarks from a retired or office-bound pilot
Which has a bearing on what, exactly?