Tradeherpete, unfortunately your explanation is correct if you are looking into the water from horizontal angle it is not true when you do it from a lower angle. the tethered system will always look to the target from a lower angle so you'll never be able to detect anything from 300ft away from you. any way you can try it , good luck
On a more relevant note, it's unreal how this stock price has declined. It figures though. ANY company that had ANY association with WSGI is bound to end up in the crapper.