Fathom ROV Tether (by the meter)
Fathom ROV Tether (by the meter)
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Fathom ROV Tether (by the meter)

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Product Description

The Fathom Tether is a high quality tether cable designed specifically for ROVs and other subsea applications. It is neutrally buoyant, has 350 lb breaking strength, and is embedded with water-blocking fibers to seal any leaks. The tether has a diameter of 7.6mm and is slimmer than the vast majority of comparable ROV tethers.

The tether carries four unshielded twisted pairs (UTP) of 26AWG wire. These pairs are colored and arranged in the same fashion as a Cat5 networking cable including cross-talk resistance.

The core of the cable contains Kevlar strands for strength and Dacron fibers for space filling. Both fibers are impregnated with waterblocking compound to block any leaks caused by nicks or rips in the cable. The high-visibility yellow polyurethane foam jacket resists abrasion and provides neutral buoyancy.

The stiffness of the cable is designed to be flexible enough to give plenty of freedom to your ROV, but stiff enough that it does not become tangled easily. Due to the polyurethane jacket in the new version, the tether is more flexible than the original version.

The capabilities of this tether are meant to provide design flexibility and a wide variety of uses.


  • 1 x Tether Cable with bare ends (cut to length)


Parameter Value
Tether Diameter 7.6 mm 0.30 in
Weight 0.043 kg/m 0.0287 lb/ft
Outer Jacket Polyurethane Foam
Buoyancy in Freshwater Neutral
Buoyancy in Saltwater Slightly Positive
Wire Gauge 0.14 mm2 26 AWG
Working Strength 35 kgf 80 lb
Breaking Strength 155 kgf 350 lb
Minimum Working Bend Diameter 75 mm 3 in
Compatible WetLink Penetrator WLP-M10-7.5MM-HC
DC Resistance @ 20°C 0.0386 Ω/ft 0.127 Ω/m
Insulation Resistance @ 500 VDC > 500 MΩ/kft > 1640 MΩ/km
Voltage Rating 300 VDC


Pair Wire Color Binder Connector Pin #
Pair 1 Wire 1 Blue 1
Wire 2 Blue/White 2
Pair 2 Wire 1 Orange 3
Wire 2 Orange/White 4
Pair 3 Wire 1 Green 5
Wire 2 Green/White 6
Pair 4 Wire 1 Brown 7
Wire 2 Brown/White 8