75,003.000,00 excl. VAT

The Fathom Slim Tether is a high performance tether cable designed specifically for ROVs and other subsea applications and optimized for light weight, high strength, and transportability.

SKU: 01-70-002 Category:

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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 4.0mm and is much slimmer than the vast majority of ROV tethers.

The tether carries one unshielded twisted pair (UTP) of 26AWG wire. 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.

This tether really shines when it comes to it’s size. It’s slim profile makes it ultra low-drag, making it ideal for deep dives, high current dives, and long distance dives where the drag from the tether is really noticeable. The size also makes it incredibly portable and easy to handle. A hundred meter tether weighs just 3 lb (1.4 kg) and can be managed by hand very easily.



  • 1 x Slim Tether Cable


Parameter Value
Tether Diameter 7.6 mm 0.30 in
Weight 0.043 kg/m 0.0287 lb/ft
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
DC Resistance @ 20°C 0.0386 Ω/ft 0.127 Ω/m
Insulation Resistance @ 500 VDC > 500 MΩ/kft > 1640 MΩ/km
Voltage Rating (twisted pair) 300 VDC
Voltage Rating (between pairs) 600 VDC


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

Cross Section

Additional information

Tether length

25 m (82 ft), 50 m (164 ft), 75 m (246 ft), 100 m (330 ft), 150 m (492 ft), 200 m (656 ft), 250 m (820 ft), 300 m (984 ft), 400 m (1312 ft), 500 m (1640 ft), 600 m (1968 ft), 700 m (2296 ft), 800 m (2624 ft), 900 m (2952 ft), 1000 m (3280 ft)


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