I was not thinking anything too elaborate. If we had something mounted in one place that could pivot and have a sight on it and a protractor, we could measure the angle. If we know how far the post is from the nozzle in the pond it should just be some trig to figure out the height. It could even be charted out ahead of time so they could just see the angle and know the corresponding height. This is just a preliminary thought, but it should be doable.Darren,
How sophisticated device are you thinking?