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When cables are used in underwater towing applications, the cable will oscillate or strum. This vibration of the cable can cause severe increase in the drag coefficient of the cable. As the cable is round a vortex is created at the opposite face of the cable, reducing efficiency and increasing drag.
A 'hairy fairing' will decrease hydrodynamic drag by 40%-60%, the 'hairy fairing' can be incorporated in a short length of cable i.e. 30-40 meters from the end tow fish, or for the entire length of the cable.
The fairing material can be polyester, polyamide or copolymer in construction.
Key advantages include;
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- cables are unaffected by winches or sheaving
- utilise existing deployment equipment
- major reduction in cable vibration
- reduced accoustic noise
- improved longevity of cable performance
- cable chafing and abrasion is reduced
- available in any cable diameter
Applications include;
- Seismic tow cables
- sonar buoy cables
- towed array cables
- thermistor array and string cables
- ROV tethers
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