RE: ship watch21 Nov 2020 22:19
Information received from the N.O.last position on AIS was destination Rotterdam, speed 12 knots, ETA 2300hrs 22/11/20, draught 10.5m.
N.O.on departing AM showed 3 draughts at 3 different intervals, 12.7m 9.2m and 10.5 don't ask me why it could just be down to a human error but I do know the BOD do read these boards, they have made comments about ship watchers in the past.
To work a vessel tonnage out from the draught you need to be in possession of detailed information on how much freshwater, fuel oil, stores, and other items she is carrying.
So any volumes you see bandied about using the draught can only be a guestimate.