I spent three months this year towing a trolling line behind my boat and caught absolutely nothing. I did pull it in every few hours to check if I had caught something. I also pulled it in whenever I sighted dolphins coming up to greet me. Yet I have friends with a Nic 32 in Dover who whenever I visit them feed me with fresh mackerel they have just caught with their trolling line. I asked them for a tip and they said 'always put the line out over wrecks.' Well there should be plenty of wrecks out in the middle Atlantic after the U boats had done their work [I hear the ghosts from both sides calling me; 'help' und 'hilf' all the time] and still I catch nothing. I've even sailed through a school of tuna and not attracted any fish to my line.