>
>
>I could not find a quick delivery of suitable marine cable, nor with
>strain support wire with this short lead time :/


OK, good deal on all.

For suitable/cheap cable, look for someone working in a military shipyard.
With a tiny nick in the jacket, they will throw away a 500 foot piece that
is only slightly used. Or, in some cases they throw away a new piece of
cable because the installers were sloppy and damaged it as they installed it.

Just make sure it's rated for water intrusion.

This is not trivial!

By the way, shape your device like a torpedo and put a slight downturn on
the fins. This will encourage the sensor to dive and you won't have to make
it heavy! I think you can find pictures on the internet of sonar buoys
designed to be towed at a mile or more behind the ship. Since sonar is
active, the towed sonar array could be a decoy (to have the enemy target
the decoy) or it could be an actual active unit. In any case, you get an
idea of how to shape your towed sensor.

Regards,

Art

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics