Join Date: Mar 2006
Location: New England
Thanked 16 Times in 13 Posts
Rep Power: 14
Granted, a lee shore will always be a problem. Neither drogues or sea anchors are really appropriate if you are in a lee shore situation IMHO. Both are really designed for if you are caught out in the open ocean by a storm. If you were close enough that it could become a lee shore situation, you should of either headed in and secured safe haven in a good harbor or headed out to sea to give yourself sufficient room. Failure to do either is poor seamanship IMHO.
One thing about Parachute style sea anchors, is that the shock loading that they can generate is exceptionally high, and most boats do not have sufficient hardware to take such loads for an extended period of time.
Also, parachute-type anchors, if deployed with too much or too little scope, will often be collapsed by the wave action, and may not re-deploy properly.
A JSD generates far lower shock loads, as the cones are gradually brought into use as the forces on the drogue line increase and the light straightens out. A parachute type anchor fills all at once.... with a correspondingly large shock load transmitted to the boat.
Finally, the components of a Jordan Series Drogue are generally subjected to far lower stresses individually, than are the components of the parachute-type sea anchors and drogues. This greatly reduces the chance of the components failing. The redundancy of the Jordan Series Drogue's design also makes any individual cone far less significant in what portion of the drogue's capabilities it contributes... with a parachute type anchor... everything is concentrated in the one parachute—effectively all your eggs are in a single basket.
Also, many storms do not necessarily move in the same direction as the winds they contain.... this is particularly true of storms that can last for days. Generally, only short duration storms, like summer thunder squall lines will move in the same direction as the winds that generate them. In most short duration storms, other tactics are usually sufficient to weather them.
Look at all the really major storms, like that of the 1979 Fastnet race or the 1998 Sydney-Hobart race... both were essentially revolving storms, similar in nature to a cyclonic or TRS type storm, in fact, if not in origin. Most multi-day survival situations will involve a storm that has a cyclonic or revolving component to it.
Often, moving in the direction of the wind is better than just sitting there, since the kinetic energy dispersed against your boat is far lower. For instance, if the waves are moving at 15 knots... and you aren't moving you've got significantly more energy than if you are running at 3 knots with them. Given the same size wave striking the boat, you would have 225 units of force vs. 144 units of force... or only 64% of the energy being spent against your boat.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Still—DON'T READ THAT POST AGAIN.
Last edited by sailingdog; 05-20-2007 at 11:58 PM.