Since I had no idea what the jet boat weighs I decided to start with that one. I'll take the Triton in a couple of days.
I had never used a CAT scale before and it took two tries to get it right. The first time I thought I only wanted the trailer axle on the scale. When I saw the print out I figured out the proper procedure. Readings were steer axle - 2980, drive axle - 3300, trailer axle - 3160.
For purposes of choosing tires and pressure I figure the trailer axle is the important number. I am also assuming that unless you know the drive axle weight without the trailer that number doesn't help you much. If you want to know the tongue weight do you unhitch on the scale and have the jack stand on the part of the scale that would normally read the drive axle? Alternatively I could take the truck back and weigh it alone.