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#1
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You should (well, might) be able to control the boat without anyone
jumping to the the dock. If you have an after spring already cleated at the bow such that the eye just reaches a dock cleat, all you have to do is snag the cleat as you go by. Admittedly, this is easier said than done, but I have a line with 6 feet of lifeline cable fed into the single braid, and so far, my wife has been able to snag the cleat if I can get the bow close. With your lower freeboard, and more agile kids, it should be easy, and they still have the opportunity to jump to the dock. Once you're snubbed on that, you can stay idling in forward, and use the rudder to swing the bow or stern in as needed. The dynamics will, of course, vary from boat to boat, and you may needed to play some with the attachment points. Yesterday, I used this technique to come in with the wind blowing 10 knots off the dock. Once snubbed, we were stopped a few feet behind the boat in front, and with a little throttle I could tuck in the stern and hold the boat against the dock. Roger Long wrote: For those of you who read and responded to my docking angst: It’s a great feeling when it starts coming together. We returned late yesterday afternoon tired and burnt from our first overnight and headwinds all the way back. The docking scenario was the usual for our slip, strong quartering tailwind blowing the boat off the dock which is on the side the reverse sternwalk swings away from. The ebb tide also runs across these slips in about the same direction as the wind so everything is resisting stopping the boat and pushing it away from the finger dock. We didn’t have the tide to cope with last night but the same method has worked well on days that it did with the same shore breeze. This docking began with the discovery that someone had docked a damaged boat with the mast on deck sticking about ten feet out into our already tight turning area. My wife has finally learned that yelling, "You’re too close to that boat!" isn’t a necessary part of the docking procedure and my kids interestedly inspected the masthead as it went by about eight inches away. As we swung into the slip, a neighboring transient boat owner ran over and then just stood there as the lines went ashore and the boat stopped. He said, "I was going to help but the young men seem to have it completely under control. They really know what they are doing." That made everybody feel pretty good. Here’s what’s working for us if anyone else is still struggling with this: Bow and stern lines laid out along the rail amidships to the boarding gate. Aft spring only coiled and ready to go. One kid takes each line and jumps as soon as the end of the dock reaches midships. Their instructions are simple, pull the slack out the line, get two round turns on the cleat as quickly as they can, hold. Don’t wait for any instructions. With the stern line on, I can back as hard as necessary to stop and hold the boat. I can get the boat so the linehandlers step off across just a few inches of water but the boat still ends up about six feet out by the time the lines are on. I then pull and release the stern line as my son holds and takes up the slack to pull the stern in. Intermittent applications of reverse keep us in position. When the boat is close enough for the sternson to reach the spring line, he cleats it and sets the spring. Then it’s engines off and pull the bow in. Forward spring is set at leisure. I’ve done this with just one line handler and it works just as well as long as the stern line goes on first with a couple of additional diagonal turns. We’re at the point now where we can do the whole evolution without a word being spoken so we’re going to start looking very smooth to the loungers on the other boats. Here’s our undocking procedu Cast off lines. Brief application of reverse until boat starts to move and then neutral as I learned from this newsgroup. Son tending dinghy drops painter which he forgot to secure as ordered (or maybe it slipped off the cleat). Other son yells. Stop boat which starts to swing into piling. Son reaches down and grabs dinghy painter. Resume backing out. Snap hook (now replaced) twists in such a way as strain come on painter that it pops off. Son yells. Helmsman gets that deer in the headlights look. Other son has presence of mind to grab boathook, snare dinghy thwart, and hold on. Continue reverse towing dinghy with boathook. Watch bow swing and anchor miss piling by quarter inch. Get clear, stop, and secure dinghy. Motor sedately away as if it was all planned. Yes, it’s great when it all starts coming together. |
#2
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How large is your boat? Ours is fairly heavy for a 32 footer and,
even at the minimum speed for rudder authority, it would be quite a jerk coming up against a hard loop like that with the current behind us. Cushioning with reverse would draw the stern out assisted by the springing effect. Big recovery with lots of forward power then to get the stern back in. Missing the loop wouldn't allow thought and action time to get the engine in reverse before running up on the main dock. Our finger is just the length of our boat. I tried all sorts of spring line scenarios first because of my large boat experience which resulted in some good shows for our neighbors. When my kids are more experienced line handlers and know how to ease and hold without shouted instructions, I'll probably go back to using springs more. Right now, I'm trying to keep line loads, especially sudden ones, to a minimum since inexperienced fingers are holding lines close to cleats. The nice thing about my current method is that the sideways sternwalk force is the largest line pull aside from windage. Nice and easy, no dock contact, no vessel inertia against the lines. When the wind is from the northwest, it's easy. Just pull up, stop, and blow in. -- Roger Long "Jeff" wrote in message ... You should (well, might) be able to control the boat without anyone jumping to the the dock. If you have an after spring already cleated at the bow such that the eye just reaches a dock cleat, all you have to do is snag the cleat as you go by. Admittedly, this is easier said than done, but I have a |
#3
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Roger Long wrote:
How large is your boat? Ours is fairly heavy for a 32 footer and, even at the minimum speed for rudder authority, it would be quite a jerk coming up against a hard loop like that with the current behind us. Cushioning with reverse would draw the stern out assisted by the springing effect. Big recovery with lots of forward power then to get the stern back in. I have a 36 foot catamaran, with a fair amount of windage and not much weight (about 10,000 lbs loaded) and not much keel efficiency at low speed. My problem is that I'm on a face, with large boats in front and behind, so I have to work the boat sideways, often against the wind. You don't want to snub up suddenly, but if you can glide in and simply burn off speed this technique might work for you. Once the boat is stopped, you can use as much forward as needed to draw the stern back in - in fact, you should be able to waggle the boat back and forth with the helm. Missing the loop wouldn't allow thought and action time to get the engine in reverse before running up on the main dock. Our finger is just the length of our boat. You have the full length of the boat, which must be the same space you're already using. Remember, all you actually have to do is bring the bow to the tip of the finger and then ease the boat in. Once the spring is attached, several degrees of freedom have been removed from the system. I tried all sorts of spring line scenarios first because of my large boat experience which resulted in some good shows for our neighbors. When my kids are more experienced line handlers and know how to ease and hold without shouted instructions, I'll probably go back to using springs more. Right now, I'm trying to keep line loads, especially sudden ones, to a minimum since inexperienced fingers are holding lines close to cleats. I had to go to this because bystanders would tend to grab the nearest line and cleat it randomly, often leaving use dangling 15 feet away from the dock. By stay focused on getting one preset line on the proper cleat, I then have full control from the helm. The nice thing about my current method is that the sideways sternwalk force is the largest line pull aside from windage. Nice and easy, no dock contact, no vessel inertia against the lines. Its fine as long as you have enough hands. When the wind is from the northwest, it's easy. Just pull up, stop, and blow in. Yup. Murphy's Law, however. The wind is always worst when there's no one on the dock to help. |
#4
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Certainly a very sound method and probably the best option for getting
into a spot like yours. It's also one we need to learn. We're still at the stage where I'm trying to minimize the feeding out of lines. I have great respect for the inertia of 12,000 pounds at even minimum speed if a loop takes a finger or foot into a chock. -- Roger Long |
#5
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In article ,
"Roger Long" wrote: How large is your boat? Ours is fairly heavy for a 32 footer and, even at the minimum speed for rudder authority, it would be quite a jerk coming up against a hard loop like that with the current behind us. Cushioning with reverse would draw the stern out assisted by the springing effect. Big recovery with lots of forward power then to get the stern back in. Have you tried a short, hard reverse and noticed the effect on prop walk? We're 7,000+ pounds, swinging a 16" 3-blade and that stops or starts us straight with a quick burst. At minimum reverse and a hard-over rudder, I can flip the boat in about its length with prop walk. All boats differ, of course. -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
#6
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"Jere Lull" wrote in message news:jerelull- Have
you tried a short, hard reverse and noticed the effect on prop walk? Yes, we can do that. However, with the current behind us, stopping relative to the dock means reversing direction and establishing a half to three quarter knots of stern speed relative to the water. Getting that flow reversed over the hull with a period of being motionless in the water while still moving forward fast enough to bump the main dock hard lets the stern start swinging. The current also runs at an angle away from the dock. The dock slows the cross current for the front part of the boat while the stern is still sticking out. You've really got to get that stern line on. -- Roger Long |
#7
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In article ,
"Roger Long" wrote: "Jere Lull" wrote in message news:jerelull- Have you tried a short, hard reverse and noticed the effect on prop walk? Yes, we can do that. However, with the current behind us, stopping relative to the dock means reversing direction and establishing a half to three quarter knots of stern speed relative to the water. Getting that flow reversed over the hull with a period of being motionless in the water while still moving forward fast enough to bump the main dock hard lets the stern start swinging. The current also runs at an angle away from the dock. The dock slows the cross current for the front part of the boat while the stern is still sticking out. You've really got to get that stern line on. Oh! THOSE conditions change the equation considerably. I'm even more impressed by you and your crew's performance the other day. That spring line is your best friend... -- Jere Lull Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD) Xan's Pages: http://members.dca.net/jerelull/X-Main.html Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/ |
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