The internals of the AUV performed the heavy work of actually taking water quality measurements and controlling the submersible's buoyancy. Evidently, it also required a sophisticated mechanical design to fit the necessary components into the confined...
Test LEDsPrior to mounting anything, I suggest wiring everything up on a workbench (or the floor) and making sure everything is wired correctly and happy.
Last layerOnce this layer partially cures, mix up another batch of epoxy and coat everything again. Make sure everything is totally submerged at this point. Now let it cure overnight.