Start by laying out the components in their approximate locations in the enclosure. Here are a few considerations:
A range finder for stage measurement must face the water’s surface.
Wires to the auxiliary sensors should be routed out of the way of the range sensor.
The 3G antenna should be placed as far as possible from the batteries or large metal areas.
Battery replacements / charging should be made easy.
Panel Mounted Components¶
Cut holes for components that need access to the outside of the enclosure. Usually the ultrasonic range sensor, auxiliary sensor jack and button. If possible, attach leads to these parts before they are mounted.
Use epoxy to seal these holes if waterproof panel mount solutions are not available. After preparing both surfaces, apply the epoxy generously. Avoid getting epoxy on the ultrasonic sensor’s transducer.
Things in the case should be relatively secure. Velcro and double sided foam tape work well if you are trying to avoid making unnecessary holes in the enclosure. Again, prioritize battery replacements and repairs when doing so.