Companies who advertise that they make ROV tethers:
- South Bay Cable Corporation
- Cortland Company
Our cable is substantially simpler than what these guys advertise, so I didn't request a quote from them on this first pass - these seem like the guys that would charge a premium.
Other custom cable manufacturers:
- Calmont Wire and Cable*
- New England Wire Technologies*
- Cooner Wire*
* = I have requested a quote (see below)
Note: there are dozens, if not hundreds, of companies in the US that can do this sort of work. I list these few as my company has dealt with them before.
Here's the details of my quote request. I punted on some of the values - I figure that once we have a ballpark price, we can decide if more features are necessary and have a more detailed discussion of the specs.
- Two conductors (~28 Ga, UTP)
- waterproof, abrasion resistant sheath material
- neutral buoyancy in water (weighs ~1 gram per cm^3)**
- OD should be as small as reasonably possible - on the order of 0.060" (we're flexible on this number)
- Should be strong enough to support 40 - 50 lbs (40 is acceptable, 50 is better.)
I offered that we'd probably place orders for 2000-3000 feet at a go, and we are willing to adjust specs to control price
** I'm assuming that the tether should be neutral in fresh water - specifically, it should not sink, since there is usually lots of stuff to get tangled in at the bottom of ponds, lakes, rivers, caves, etc. This means the tether will float in saltwater, which seems fairly safe - overhead environments could result in tangles, but that's the trade off. If we decide that we are interested in a saltwater-neutral cable, the cost will probably be very similar.