Really simple.I have put four 32mm dia cup magnets on the bottom and whilst it gives it extreemly good contact it is easy to break the magnetic field by just pulling it back. The other benifit is that you can place it wherever you want on any metal part of the boat witout any drilling welding etc and can be stored away from prying eyes when you are away from the boat (see pic)
Shot at 2007-06-26
Shot with DMC-TZ3 at 2007-06-26
Re Illegal union flag I could be Johnny Foreigner and flying it as a courtesy flag.
Yar Well ( I'm English through and through so I,ll take it down)