Neutral Buoyancy ROV Tether
Neutral Buoyancy ROV Tether
Custom Subsea ROV Cables
Neutral buoyancy ROV tethers are engineered for subsea environments where stability, control, and reliability are critical. ROV Tether is custom-designed based on operating depth, load conditions, and system architecture to ensure optimal performance in demanding underwater environments.
Unlike conventional ROV cables that tend to sink or float, neutral buoyancy designs achieve a balanced density in seawater, allowing the cable to remain suspended with minimal impact from gravity or uplift forces. The ROV tether significantly improves ROV maneuverability, reduces mechanical stress on the tether system, and ensures more efficient operation in deep sea exploration, inspection, and mining applications.
Custom Cable Solutions | Flexible MOQ | Fast Lead Time |
Key Features
↗Marine-grade polyurethane foam layer designed for seawater-resistant neutral buoyancy performance
Neutral buoyancy can be engineered to match:
freshwater (~1.00 g/cm³),
seawater (~1.02–1.03 g/cm³), or other specified densities.
↗Cable Diameter: Customizable from 2 mm to 60 mm
↗Tensile Strength: Customizable from 100 kg to 10 tons
↗Water Blocking Filler: Special water-blocking yarn for enhanced moisture protection
↗Outer Jacket: Glossy seawater-resistant polyurethane (PUR) sheath for marine environments
↗Shielding Coverage: 85% coverage density
Specifications
Construction
Conductor: Fine-stranded, extra-flexible tinned soft copper wire, Compliant with IEC60228（VDE 0295）Class 6.
Insulation: TPE, TPE, TPV, XLPE, DPEM
Core Structure: anti-twist layering, grouped gap filling, twisted pairs, and layered binding.
Shielding: A combination of tinned copper braid provides EMI/RFI shielding.
Tensile Strength Member: Central Kevlar Core, Interstitial Kevlar Fill, Kevlar Braid
Outer Sheath: PUR, PE, TPU
Electronic Data
Working Voltage: 300/300V~0.6/1KV
Test Voltage: 2000 V
Insulation Resistance: ≥20 MΩ·km (at 20°C）
Minimum Bending Radius: Dynamic: 7.5 × OD, Fixed: 4 × OD
Operating Temperature: -40°C to +105°C
Number of cores x cross section | Conductor Diameter mm | Outer Diameter mm | Cable Weight kg/km | Minimum Breaking Load N |
|---|---|---|---|---|
| 2×1 | 0.2 | 8 | 30 | 2500 |
| 2×0.086 | 0.1 | 4.1 | 12 | 1300 |
| 2×1.5+2 cores fiber | 0.21 | 13 | 40 | 6000 |
| CAT5 | 0.25 | 8.5 | 20 | 6200 |
| 2×0.5+(2×0.3) | 0.15 | 9.8 | 22 | 2500 |
| 6×4+2 cores fiber | 0.21 | 35 | 470 | 5500 |
| 3×35+2×16+2 core Single-Mode optical fiber | 0.25 | 70 | 2200 | 12000 |
| 2×2.5+(3×2×0.3)P+4 cores Single-Mode optical fiber | 0.21 | 18 | 650 | 2000 |
| CAT5+2×2.5 | 0.21 | 10 | 80 | 1500 |
| 2×2.5 | 0.21 | 13 | 65 | 2000 |
| 2×1.5 | 0.2 | 9.5 | 50 | 1400 |
| 3×2×0.2 | 0.1 | 8 | 35 | 600 |
| 3×18AWG | 0.15 | 12 | 38 | 1000 |
We offer solutions tailored to specific customer requirements. 
Applications
Underwater Vehicles Sonar Systems Subsea Communications & Monitoring
Case Study
For extreme cold environments, customized ROV tether cables are engineered to maintain flexibility, mechanical strength, and reliable performance under low-temperature offshore and polar operating conditions.
→ Low Temperature ROV Tether Cable Solutions
Quality Testing & Control | Manufacturing Process |
Manufacturing Process
Our industrial cables are manufactured through controlled processes covering extrusion, reinforcement, assembly, and final inspection. Below are examples of key manufacturing stages that demonstrate our production capabilities and quality control processes.
→Cable Core Assembly Process →Wire Stranding Process →Kevlar braiding process
Test Equipment
Ordering Information
MOQ: project-based negotiation
Standard Lead Time: 3-6 weeks after order confirmation
Customization: Fully supported
Custom Development Works
Engineering Insight
Achieving stable underwater performance requires careful control of cable weight, buoyancy materials, and mechanical structure. A neutral buoyancy ROV cable helps reduce vehicle load and improves maneuverability during long-duration subsea operations.
