Damper mechanism for floating objects

[Parsnip]

Hi,
How can I design a damper to prevent vertical movement of an object suspended at a depth greater than 15m below a surface float which is driven by the wind and the tide. There is an elastomer link between the damper and the object and I am just having difficulty in the best way to approach any design work.
Cheers in advance

 

[GregLocock]

Clue: vertical movement relative to the surface float, or to average depth, or what?


Cheers

Greg Locock

 

[Parsnip]

Sorry - meant to state that the object must stay at the same depth regardless of what displacements the surface float is going through.
Cheers

 

[GregLocock]

Then mount it on a spring relative to the surface float, and add damping to its own vertical motion.

Cheers

Greg Locock

 

[hacksaw]

active or passive dampening?

 

[GregLocock]

Oh, I'd have thought ribbons or a parachute like device would be adequate

Cheers

Greg Locock

 

[hacksaw]

at least colorful