How to prevent my boat from rock&roll?

Seajet said:
Yes I have already been told this, so I downgraded to a bucket over the side, ideally with a spare kedge anchor or other weight in it; good luck, I hope either this and / or anchoring ( if depth suits ) and having a line from the stern to the anchor warp so as to adjust the angle she lies at, as Zing mentioned, at least helps a bit.

If yo mean a foredeck mooring cleat it's a bit far forward, midships would be best but that may not be available to you ?
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Yes, I saw Bouba mentioned about my motor boat after I posted.

As regarding to the cleat location, I should say "mid ship cleat" instead of "center cleat".
In Taiwanese, "center" and "mid" mean same thing so I did not make myself clear.

I will try a bucket with weight stuff in it since my fishing locations are far too deep to deploy an anchor. (usually between 100 ~ 120 meter deep)
 
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Bouba said:
If you spend hours fishing you don’t want to leave your big outboard running all the time. With electric it switches on instantly, also you can have foot controls so you can use it while still fishing (you don’t have to put your fishing rod down).
This is a very common thing for a fishing boat to have, they are not too expensive also you can put it on the front, back or corner of the boat, which ever is the most effective. The boat will move easier if the big outboard is raised up out of the water.
That is also something that you can test, when fishing see if the boat drifts differently when the outboard is in or out of the water. But it’s been my experience that all boats end up with the waves at the side, which is always the most uncomfortable.
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Thank you very much, Bouba.
I don't even know the troller motors can be controled by foot. I will do some research about troller motors. You are right, they are more flexible and can provide instant adjustment.

Thank you very much.
 
jiris said:
If you are serious and ready to spend some money, the ultimate solution is a gyroscopic stabiliser. You would be looking at quite a few grand though.
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I agree that gyroscopic stabiliser is the ultimate solution, it solves one of my problem.
But my biggest problem is my Empty Bank Account ......
 
The bucket would work better if you cut the bottom out, leaving a rim around the base of half an inch. Then cut a piece of 6mm ply weighted with a small piece of lead near one edge. On the other edge form a hinge to the rim with some string or piece of webbing. This forms a flap on the inside of the base. Then it closes as the boat rises & opens as the boat falls.
Attach a weight to some string which is attached to 3 points on the bottom of the bucket to get it to sink level & quickly

This then creates greater drag on the up swell. Do one each side.
Weighted buckets do not work so well as the water has to go around the side & up over the top of the bucket on the down stroke. It can tip over & not fill so easily on the up stroke
 
Daydream believer said:
The bucket would work better if you cut the bottom out, leaving a rim around the base of half an inch. Then cut a piece of 6mm ply weighted with a small piece of lead near one edge. On the other edge form a hinge to the rim with some string or piece of webbing. This forms a flap on the inside of the base. Then it closes as the boat rises & opens as the boat falls.
Attach a weight to some string which is attached to 3 points on the bottom of the bucket to get it to sink level & quickly

This then creates greater drag on the up swell. Do one each side.
Weighted buckets do not work so well as the water has to go around the side & up over the top of the bucket on the down stroke. It can tip over & not fill so easily on the up stroke
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"Do one each side."
Are you saying to hang 2 buckets, one on port side and the other on starboard side?
 
An alternative is to tie a spring to the anchor line and bring the boat's bow facing the swell. I have seen this suggested as a means of getting a quiet night at Braye but never tried it.
 
Seajet said:
It's going to take a huge amount of ballast if the boat doesn't have a keel or the inertial damping of a rig; my boat is wide beam and has a deep keel with 950lbs ballast bulb on the end, 40% ballast ratio, she's very stiff under sail; but when the mast is down she's surprisingly susceptible to roll, something reported by people on big blue water boats when dismasted.
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Not an unreasonable amount. Worked fine on my old Senior 31.
 
I did that to good effect in Omonville La Rogue once. Also tried it to face the wake from stinkpotters flying around in Studland Bay, with less success :(

However, it won't help the OP in 100m of water. As others have suggested, my first attempt would be a cheap bucket with a few rocks in on each side, a metre or two below the surface and attached as close to midships as practicable.
 
johnalison said:
An alternative is to tie a spring to the anchor line and bring the boat's bow facing the swell. I have seen this suggested as a means of getting a quiet night at Braye but never tried it.
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If I tried that with my boat she would be sailing 360's all night long. It is bad enough on an ordinary anchorage without tempting fate.
Before I had a marina berth, I often used to stand on the shore, watching her do circuits all day long.
 
I thought the idea with a bucket (or indeed a jerry can full of water) is that you hang it so that it is just sitting awash. When rolling one direction it becomes submerged and its weight disappears (as far as the boat is concerned). When rolling the other way, the boat suddenly find itself dragging a weight into the air.
This imbalance should, in theory, act as a roll damper. A bucket with a heavy weight in it will basically weigh the same, as far as the boat is concerned, when rolling either direction, and so it does not actively damp the roll, but merely changes the moment of inertia.

(could be wrong, it's been known to happen...)
 
A drogue to keep the bow into the wind would make a more confortable drift. But it’s not something I know much about so I’ve been hesitant about offering it as a solution
 
A drogue off the bow is great in theory, but practice soon shows the boat stays almost beam on to the waves, maybe slightly into the wind.

The purpose of having a weight in the bucket is partly extra roll damping, partly as if the boat rolls much the other way the water may spill out, then the bucket floats uselessly.

Heavy stones are a good idea as one can discard them harmlessly ( unless a diver or jetski is bothering one :) ) before the return trip.
 
Seajet said:
A drogue off the bow is great in theory, but practice soon shows the boat stays almost beam on to the waves, maybe slightly into the wind.

The purpose of having a weight in the bucket is partly extra roll damping, partly as if the boat rolls much the other way the water may spill out, then the bucket floats uselessly.

Heavy stones are a good idea as one can discard them harmlessly ( unless a diver or jetski is bothering one :) ) before the return trip.
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Thanks about the drogue, like I say, I only know of them I’ve no experience. As for the buckets, what stops the buckets from scratching the hull?
 
The bucket itself shouldn't scratch the topsides as it's underwater then you can keep it off by hand when deploying or hauling it up; a bit of chafe resistant material over the gunwhale is a good idea - I find old rubber car mats have many uses, also under fuel tanks or outboards in lockers.

In the case of the bucket line over gunwhale you could drill holes in said rubber car mat and fit lines and /or electrical tie wraps to a thwart or something to keep it in place.
 
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