i recall from earlier trips that Moorings used to include a lead line in their on-board equipment. This was back in the days when it seemed like calibration was the least of issues with the depth sounder so perhaps they don't do it any more. Also, given the amount of equipment stored in the lockers, getting to the bottom to find said lead line (if it exists) would be an archaeological dig.

High on our list for our next trip (maybe 07/2020?) will be to verify the sounder calibration. Also we'll make sure that someone hasn't turned off the anchor windlass breaker before we depart. I've tripped breakers before when using the windlass but never was sent out with the breaker in the off position.