"Jean" wrote in message
...
Hi,

I am looking for any kind of information about this problem, websites or
whatever.
thanx
jean


Big subject, lotsa reading on the web..

here is a start
http://www.kastenmarine.com/mbqCref.pdf
http://mtifilters.com/mtifilters/MARCC.html#anchor11328
http://www.sailmail.com/grounds.htm
http://www.kcnet.com/~haroldv/cor_metl.htm


regards
garry crothers