Kate Hawkins from Manx National Heritage (MNH), theorganisationbehindtheproject, said there was always the chance of getting marooned, especially in the winter.
Randi Humborstad, project leader at Nordfjord Vekst, theorganisationbehindthe tunnel plans, cites a 161-passenger cruise ship that was almost shipwrecked in 2004 as further evidence of the area's fierce conditions.