If your going to quote Maritime law then get your facts straight first, you are not a vessel restricted in your ability to manouvre, this applies to trawlers hauling nets, long lines etc, your a rec vessel, the definition is as follows,
Vessel Engaged In Fishing:
Any vessel fishing with nets, lines, trawls, or other fishing apparatus which restricts maneuverability, but does not include a vessel fishing with trolling lines or other fishing apparatus which do not restrict manageability.
Trawling a downrigger does not in any way restrict your ability to manouvre in regard to the Navigation (Collision) Regulations 1983, you are saying that if you appraoched a an oil tanker in a narrow channel you would not be able to get out it's way because of your downrigger, ???????? you are making reference to this act as follows;
Rule 18 Responsibilities between Vessels
Except where Rules 9, 0 and 13 otherwise require:
A power-driven vessel underway shall keep out of the way of:
a vessel not under command;
a vessel restricted in her ability to manoeuvre;
a vessel engaged in fishing;
So if your going to go on a public forum and slander the people that are on the water trying to educate other boat users to avoid more deaths on our waterways then get your facts straight first.