[color:red]I understand that your boat and rig my in fact weigh as much as you say. But I was under the impression that this method of simple addition of the two scales in parallel is not altogether accurate. then again,I could be FOS



Do the math... better yet draw a free body diagram. Think of it this way...



Place 2 scales side by side, stand on one and it reads your weight. Actually it is holding you up by applying an equal but opposite force and your weight is displayed by the needle owing to the the linear relationship of spring deflection to force applied.... now as you transfer your weight from one scale to the other, they BOTH have to hold up your body weight. You weight no more or less, but the scales will read more or less. The sum of the 2 will always be your body weight.