 On the Bergen to Stavanger route, there was already a high speed service by hydrofoil, introduced early in the 1960s.The initial Westamaran models were somewhat slower than the hydrofoils, but passenger comfort, both in terms of spaciousness but especially foul weather handling, was better in the Westamarans, so they were better liked by the public.The Westamaran had asymmetrical hulls, where the insides was essentially flat, forming a tunnel between the hulls that were rectangular in shape.