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ROV Design Spec's

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Tether Management System - Umbilical Cable

The amount of drag caused by the cable extended to great depths is significant and should be minimised by using the smallest diameter cable available. This must be weighed up against the strength required as well as the number of cores needed for control and power.

Specifications

For the observational rov, we have selected the CAF9011 cable from Jacques Cable Systems. It consists of the following cores:

• 1 x 1.34 mm sq Screened Pair
• 1 x 0.5 mm sq Screened Pair
• 1 x 0.22 mm sq Twisted Pair
• 1 x 1.34mm sq Single Conductor
• 1 x 75 Ohm Coax
• P.U. sheather to 11.0 mm o.d.

Mechanical Properties:

Finished diameter is 16.3 mm (nominal). Notes:

1. Screens comprise polyester / aluminium laminate tape and 0.14 mm sq tinned copper drain wire
2. At atmospheric pressure
3. Assumes sea-water of standard density 1 026 kg / m cubed

Purchase

Jacques Cable Systems says the following about their product:

"<Our cables> are sheathed in tough polyurethane jackets. The greatest attention has been paid to keeping cable diameters as small as possible, thus minimising drag. Because of the importance of reducing the time and expense of termination and encapsulation, all cores (except coaxes) are insulated in high flexibility PVC.

Many years of experience in the design and manufacture of custom-engineered subsea cables has enabled Jacques Cable Systems to identify exactly those products appropriate for this new range of general purpose cables for communications, power and signal applications underwater. The range will be continually monitored, and expanded to meet the demands of a fast-moving market."

Available from Francois Burman of Southern Oceanics at (021) 551 2233, email francois.burman@soceanics.co.za

The contents of this page remain the intellectual property of Gavin Chait and may not be used for commercial purposes without the express consent of the author.

Disclaimer: While every effort has been made to ensure the accuracy of the information contained on this page the author can not be held responsible for the way in which that information is used.