samsturdy said..
Just a quick question from me gang. I think in the blog about Sailing North it was stated that sleeping was done in 15 minute
sessions and one blogger said how tired he became. Do you still have to do it that way if you are crossing the Pacific or on
any voyage where you are in a great expanse of sea ??.
G'day Sam.
Risk management is based on the probability something will happen and the consequences if it did happen. Risk management should always be considered this way, probability first and consequences second. For example, the consequences of driving a car and crashing could be death. Risk management, don't drive. However, the probability of this consequence is so low we drive and manage the consequences by driving carefully, wearing a seat belt etc.
My view, once away from the continental shelf the far greater probability is making a mistake through fatigue than hit by another vessel wanting the same 35 or so ft of space you are in.
So what is the probability of being hit by another ship. Coastal and in shipping lanes e.g. English Channel, cross Atlantic routes, the Straits of the world the probability is such that I believe you need someone on watch 24/7.
When off the continental shelf and outside shipping lanes I personally prefer to not be fatigued than worry about a ship wanting my 34ft of water.
I base this view of a low probability of coming into conflict with another vessel on the blue ocean not only on a bit of coastal and blue water sailing but also on thousands of hours flying over the oceans searching for ships during 10 years at sea with the Fleet Air Arm. Outside shipping lanes and fishing areas the odds of seeing another vessel is low and of it coming inside 1/2 a mile of you near zero. Of it hitting you even less.
Between 50nm out and Lord Howe Island and return on 3.5 trips (aborted half way once) we have seen one other vessel who was overtaking us, closest point of approach about 5-10nm.
Fatigue on the other hand has a very high probability of causing mistakes and injury. 20-30 minutes at a time might be ok for a day or so but you need longer sleep to avoid fatigue for longer periods.
Think of a 30 kt wind that slowly becomes a 50kt blow during the evening, you avoid reducing sail because you are too tired, it gets too bad and you must reduce sail and you are fatigued at 0300. You or crew forget to clip on, you haul in the reefing line before bringing the luff down, you lose control of the helm while yelling instructions to the man at the mast, your crew wraps the staysail sheet around the winch the wrong way then loses control of the vessel etc, etc. All these happenings can have major consequences for the boat and crew.
Arguably my biggest mistake as skipper was a poorly executed gybe that broke my boom at the gooseneck. We were 30nm from Lord Howe on my first trip there. Fatigue had a major part to play as we hadn't slept for a long time while in >40kt winds and very very big seas for the previous 12 hours. The idea of deliberately bringing on fatigue by not sleeping properly to avoid the ultra low probability of a collision at sea doesn't seem to be wise.