Carl, on that dive we were at neither of the platforms--those are more or less straight out from the ramps, and we know the platforms, graveyard and trampoline frame pretty well (though we'll have to look for that boat). Rather, we swam down the ramp and turned left 90 degrees at the end (sorry, I don't bring a compass when I'm just following lines--I probably should) and followed a steep slope down and ran into an orange line at 50 feet and decided to turn around. (We were practicing reelwork, and I didn't feel like crossing the orange one and/or heading much deeper.) Just curious where it led to. I have heard the forest is somewhere in that general direction (left of the ramps), but 130 ft. is deeper than we care to go.
I never did get a consistent reading of surface temperature, probably because we were doing ascent and descent drills (we're drysuit novices) and the computer would warm in the sun when we surfaced, etc.