Published on:2026-05-24 Click:26
Double-sheath buoyant tether 2x18AWG power + 2x22AWG power + 3x2x24AWG signal + RG59 coaxial. Full-function ROV composite tether with all data and power in a buoyant cable.
The double-sheath composite buoyant ROV tether (2x18AWG + 2x22AWG + 3x2x24AWG + RG59) is a full-function ROV tether that consolidates all required power and data channels in a single foamed buoyant cable: 18AWG for high-power thruster supply; 22AWG for secondary power (lights, payload); three 24AWG pairs for Ethernet, RS-485, and analog; and RG59 for analog camera video -- all within a double-layer buoyant jacket. 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 1 | 2 x 18AWG (0.82 mm², ~10A each) |
| Power 2 | 2 x 22AWG (0.33 mm², ~6A each) |
| Signal Pairs | 3 x 2 x 24AWG shielded twisted pairs |
| Coaxial | 1 x RG59 (75 Ohm video) |
| Inner Jacket | Solid PUR |
| Outer Jacket | Foamed micro-cellular PUR |
| Buoyancy | Near-neutral |
| Custom | Core CSA, pair count, coax count, length |
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.
A standard ROV tether typically carries only one type of electrical conductor (e.g., only twisted pairs, or only power + pairs). This composite tether combines four distinct cable types in one jacket, eliminating the need for multiple separate tether cables. The double-sheath construction protects all components and maintains buoyancy. The trade-off is higher per-metre cost and a larger OD compared to a single-function tether.
