A couple of weeks ago our boat was for sale without our knowledge on boats and outboards for 7900 ,this is a boat with two engines on the back , was it not for the fellow ribnet members that spotted it and rang we would not have known ,
So went to the show and bought Boat Warden , the moment that boat moves more then 75 mtrs it send a text msg to five numbers and it start tracking it. a siren with a light will be activated the moment the cut a cable on that boat the same thing will happen
I have a I phone with g3 but we came to the conclusion that Vodafone is better because in France Germany , Vodafone reception is much better so you can track it better hope that helps.
I still believe the South African way , 240 volts bare wires on the outside and a big snake inside and if you catch him you can shoot him as long as you fire two warning shots afterwards