No Bravo - there is no option of going by boat. If there were and it made any sense do you suppose the oil operatosr would hire those nice cheap helicopters?
Crew boat hire - maybe £2k per day can carry 100 persons, 332 what £5k per hour can carry 19?
In places where it can work - like offshore W.Africa and the Middle East, the majority of the workforce are transported by boat. Try it in the N.Sea. The one example I am aware of in the Central N.Sea where it was tried had such a lousy dispatch rate the money on building the facilities was considered wasted by the operator......
Fareastdriver - the industry risk figures are just that industry - either UKCS, UKCS plus Norway or OGP and split by region (although not helped by the FAA not categorising ditching as an accident....!). There are good summaries of all this data available via google. But the crux of it is that offshore helicopters would be shutdown in W.Europe if they were scheduled airlines - they are that far short in terms of deaths per flight/hour/sector when compared with scheduled fixed wing. So accepting that mechanically they will always lag due to the complication of the machines it still leaves a lot to make up - and they are many posters here who are trying to do that - arguing about off the cuff numbers just muddies the water.