I have a Nic 35 and did the following
I attached a tang through the lower training edge of the keel and another
tang to the bottom of the skeg.
Every year I tie a thing (1/8") staysetx line between and pull it very
taught. The only thing is I have to remember to cut it before I haul as it
would interfere with the aft strap.
I have seen it pass over many lobsterpot lines without incident. My only
problem was when we passed over a line of buoys. There was sufficient
bouincey to push up enough to draw the buoy up to the hull and catch us. To
release us, I just pushed down hard on the buoy and the line passed over the
skeg.

I have used this system for many years and never had any "vortex" issues
Dennis Gibbons
Dark Lady
CN35-207
"Roger Long" wrote in message
...
Ansley W. Sawyer wrote:

trap lines and toggles. But I was wrong! I found that when a line
went under the keel and the buoy was along side of the boat sometimes
the buoy would be pulled under and it would wrap around the cable and
secure me well to the trap.

This confirms my expectations about the arrangement. If there is any
leeway, which will be the case anytime you are not dead downwind, there
will be a vortex trailing off the keel tip. Anything floating will tend
to follow this vortex which can be quite intense as described in my other
response above. There is the potential for a floating object to go
around a rope aligned closely with the center of the vortex several time.
What a mess!

--
Roger Long