Mark 1 was never equipped with floodable ballast tanks, but it was trailable non the less. It weighs less than a Mark 2 or Mark 3.
The reason I mentioned the Mark 1 first is because of the need to weigh the rig with full tanks, empty tanks reduce the weight by 240kgs.
The Mark 2, same story full tanks, heavy boat, so we have weights all over the place. The Mark 2 with empty floodable ballast tanks was 1220kg from memory. Plus fuel and water. The Mark 2 I am working on here now has a shower tank, big fella probably 60 litres. I've restored it.
So the displacement (Archimedes principal) is the key to all this. The Mark 3, calculated by Peter Mclean NA, off the plans weights in at around 1500kgs with empty tanks.
Your boat may have fuel tanks, water tanks, grey water tank, water ballast tanks, an outboard auxiliary motor, solar panels, much electronic equipment, a heavy anchor, that extra battery that you installed, the extra bottle of scotch that you always carry and so it goes on.
Consequently, all weights mentioned on the specifications page are only a guide.
So weigh it and be certain.
Steve.
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