"I think it's fair to say that after fourteen years we are in the position where we have a very solid and very good operation," says Nilsen.

"We are well prepared, know how to handle the situation and we also have a policy of standardizing the fleet of vehicles so maintenance and renewal is much more easy.

"(But) we know that one winter will always play different from the previous ones so we (will always) learn something new," he added.