For operations in shallow water of up to 350m water depth, a tether cable may be used. During operations, the storage winch which is not equipped with an optical slip ring is used as a capstain. 

• electric motor (32 A)
• 7 kN tractive force with  5-10 m/min; approx. 20 m/min when manually paying out the tether
• drum dimensions: outer diameter 1600 mm, width 650 mm, minimum bending radius 450 mm
• weight: approx. 700 kg

Tether cable: 

• manufacturer: Norddeutsche Seekabelwerke GmbH
• 28 mm outer diameter; 500 m length
• Aramid-armoured outer shell 
• neutrally buoyant in water
• 3 copper wires (4160 VAC) @ 4 mm²
• 3 optical fibres (single mode)

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