Published on:2026-05-24 Click:15
Gray-sheath 4 power + 1 pair data ROV tether cable, neutrally buoyant. Foamed PUR, gray jacket for ROV tether requiring 4 power channels and 1 data pair.
The gray sheath 4-power + 1-data-pair neutrally buoyant ROV tether uses a gray foamed PUR jacket (instead of the standard yellow/orange) and combines four power conductors (for multi-zone thruster or multi-supply power distribution) with one shielded twisted pair (for RS-485 control or analog feedback). Gray jackets are specified when ROV operators prefer a less conspicuous tether or when the tether must match specific deck equipment colour-coding. The foamed polyurethane (PUR) jacket uses a micro-cellular expanded jacket compound with a bulk density lower than seawater (~1.025 g/cm³), giving the cable near-zero or positive net buoyancy. This eliminates tether sag and reduces drag force on the ROV, improving vehicle manoeuvrability and reducing tether management workload during subsea operations.
| Parameter | Specification |
|---|---|
| Power Cores | 4 x stranded tinned copper (CSA per spec) |
| Data Pair | 1 x shielded twisted pair (24--26AWG) |
| Jacket | Foamed micro-cellular PUR |
| Jacket Colour | Gray |
| Buoyancy | Neutrally buoyant |
| Custom | Core CSA, pair shielding, length, Kevlar |
Request datasheet, custom length, or OEM pricing: sales@rovcable.com -- Shanghai Kabel Intelligence Technology Co., Ltd.
The jacket is manufactured from a micro-cellular expanded (foamed) polyurethane compound. During extrusion, a controlled foaming agent creates millions of tiny closed-cell air pockets within the jacket wall. These air cells reduce the bulk density of the jacket below that of seawater (~1.025 g/cm³), producing positive or neutral net buoyancy. The jacket retains all the abrasion resistance, oil resistance, and flexibility of standard PUR while achieving the buoyancy needed for ROV tether applications.
Yes. Buoyancy (positive, neutral, or slightly negative) is tuned by adjusting the foam cell density in the jacket compound and the jacket wall thickness. Specify the required net buoyancy per metre (in g/m) and the water salinity (fresh / brackish / seawater) when ordering. We can also add a Kevlar or Dyneema strength member to increase tensile strength without significantly changing buoyancy.
