Imagine that you are anchor down in paradise and the weather report says that a tropical low is heading your way. You decide to sit it out at anchor because your anchorage appears secure. The tropical storm intensifies and conditions become wild in the anchorage with wind gusting to seventy knots. It's pouring torrential rain and you are worried about chafe of your anchor bridle. Even worse, your roller furler has started to unwind, and the genoa is flogging in the wind. What gear should you put on to deal with the problem?
Imagine that you are sailing offshore and an intense low pressure area or a squash zone overtakes you. The wind is blowing sixty five knots with higher gusts and the rain is blowing horizontal. There is a problem on deck that requires your attention. What gear should you put on to deal with the problem?
The traditional answer is that you should get in your foul weather gear to deal with the challenge on deck.
There is another answer that we used on Exit Only. We carried a full wetsuit from head to toe for such emergencies. Foul weather gear is bulky and presents a large profile to the wind gusts. They are rather like the flying squirrel wing suits that people are using to glide with when they jump out of airplanes. You can really get blown around, maybe even overboard in your foul weather gear/flying squirrel wing suit in a tropical storm. And if you do get blown overboard, waterlogged foul weather gear provides little protection from hypothermia and is very difficult to swim in.
A full wetsuit has some advantages in this type of crisis. The suit presents very little wind resistance so that you are no longer wearing a wing suit. It's easier to move around on deck and there is less risk of getting blown overboard (you should be wearing a harness and a tether). It doesn't matter how hard it rains or how much sea water is dumped on you, you remain warm and able to work. In the event that you get blown overboard or fall overboard, you are buoyant and you can easily swim in the wetsuit.
On Exit Only we carry one full body wetsuit for situations like these. It also doubles as an immersion suit if the need should arise.
Do any of you multihull sailors use a full body wetsuit for foul weather gear in extreme weather?