Winch and Cable
Specifications
* Maximum speed of tow will be 3.5 knots, about 355 ft/min or 108
m/min
* Maximum depth 3000 ft, 915 meters.
* Maximum cable length: 4000 ft, 1220 meters.
* Maximum cable diameter 1/4" communication cable parried with a
3/16 synthetic
strength member bound together with a 2 inch wide fairing material
* Single speed drive.
* Electronically load sensor in order to release line and alert the
pilot in the even the tow is fouled.
* DC Electric powered. Preferably 12v Cable
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

4pr 24 gauge AWG 4 pair Cat 5E Direct Bury |
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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.
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