[PSUBS-MAILIST] Reversed echo sounder

[Lasse Schmidt via Personal_Submersibles]

Hey guys,

We are in the process of finishing our submarine and got an idea we really don´t know if it works.
Is it possible to turn an echo sounder towards the surface to measure the distance to the surface?
The reason I wonder is because the log is equipped with an echo sounder and it would be cool to actually have the depth visible on the MFD.

Sea trials next week!

Lasse Schmidt
Upplevelsepresent.se
Skeppsbron 21, Tullhus 1
11130 Stockholm
070-28 32 660