Winch and Cable
* Maximum speed of tow will be 3.5 knots, about 355 ft/min or 108
Specialty cable for deep water ROV's is very expensive so we are opting for using the common, inexpensive bury type Cat 5 computer network cable network with 4, 24 awg twisted pairs
To get an accurate wet weight we measured out 200 ft of this cable and weighed it while immersed in our seawater tank. 200 ft weighted in at .39 pounds, 6.24 oz or 177 grams.
Another idea was to use Syntatic foam floats to offset the weight of the cable, in order to make it slightly positive buoyant. Philip Muhh drew up a float for the cable that has a volume of 3.898 cubic inches (64ml). SF-38 is 38 lbs/cubic ft and seawater is about 64 lbs/cubic ft so it will provide 26lbs/cubic ft of buoyancy or .24186 oz/cubic in. So the 3.898 cubic inch float will provide (3.898*.24186) .94 oz per float. So each float should suspend (.94*200/6.24) about 30 ft of cable.