SUBSEA HD VIDEO CABLE FOR UNDERWATER VIDEO SYSTEMS — professional-grade subsea video cable with 75-ohm coaxial core, depth-rated to 7,000 m. Supports HD-SDI, CCTV, analogue and digital video. Flexible PUR jacket, waterblock construction, Kevlar strength option. For ROV, diver cameras, and underwater surveillance systems.
This SUBSEA HD VIDEO CABLE FOR UNDERWATER VIDEO SYSTEMS delivers uncompromised video signal quality in the harshest subsea environments. At the core is a precision 75-ohm coaxial element — the industry-standard impedance for video transmission — rated for analogue CCTV (standard definition), SDTV (270 Mbps digital), and full HD-SDI (1.485 Gbps) signals. A flexible polyurethane jacket rated to 90°C encloses the coaxial core alongside power conductors, control signal pairs, or optical fibres depending on configuration.
From fish finder cameras at 50 m to work-class ROV systems at 3,000 m and scientific deep-ocean vehicles to 7,000 m, this cable series provides the low-loss, pressure-stable video link needed to capture high-resolution images and video in real time.
| Parameter | Specification |
|---|---|
| Coaxial Impedance | 75 Ohm (±2Ω tolerance at rated depth) |
| Capacitance | 16.7 pF/ft (standard); low-loss dielectric variants available |
| Signal Standard | Analogue CCTV; SDTV 270 Mbps; HD-SDI 1.485 Gbps; 4K-SDI 3.0 Gbps |
| Depth Rating | Shallow: 200 m; Mid: 3,000 m; Deep: 7,000 m |
| Temperature | -25°C to +90°C; jacket to 120°C short-term |
| Power Conductors | Optional 2–16 AWG; 300V–1,000V |
| Jacket Material | Xtreme-grade PUR; abrasion, UV and ozone resistant |
| Shield Coverage | Al/mylar tape 100% + braided tin-Cu 95% minimum |
| Break Strength | 250 lbs (mini-flex) to 2,400 lbs (Kevlar ROV tether) |
| OD Range | 5.6 mm (mini) to 15 mm (combined camera/power/control) |
| Conductor AWG (centre) | 26 AWG (deep mini) to 18 AWG (RG11 deep) |
Hydrostatic pressure compresses cable cores, changing coaxial geometry and shifting impedance away from 75 Ohm. Impedance mismatch causes signal reflections visible as ghosting, colour error, and sync loss on analogue monitors, and CRC errors on digital HD-SDI links. Our pressure-stable waterblock core design maintains 75-ohm impedance within ±2Ω at rated depth — ensuring clean video from shallow water to 7,000 m without equaliser adjustment.
Analogue composite video is susceptible to colour degradation, luminance noise, and bandwidth limitations over long cable runs. HD-SDI is an uncompressed digital standard carrying 1.485 Gbps — immune to analogue noise pickup and capable of transmitting 1080p HD video with audio and timecode in a single coaxial cable. Our deep HD-SDI variants carry HD-SDI to 7,000 m, delivering broadcast-quality video from the deepest subsea cameras.
Using separate video, power, and control cables on ROV systems increases tether diameter, drag, and connector complexity. Integrated video-plus-power cables reduce tether OD by up to 40%, reducing drag and extending ROV operational range in currents. Combined cables also reduce subsea connector count — the single greatest source of failure in underwater systems.
Standard PVC video cables become brittle below 5°C — the typical temperature at ROV working depths. PVC jacket cracking exposes the screen braid to seawater, causing rapid corrosion and electrical shorts. Our PUR jacket remains flexible to -25°C and is chemical-resistant to hydraulic fluid, diesel, and seawater — maintaining jacket integrity throughout multi-year deployments.
Diver handheld camera cables experience abrasion from rock, coral, and equipment contact that rapidly cuts through polymer jackets. Our stainless steel braid armour variant provides a near-indestructible outer layer while maintaining video signal quality — a design proven in commercial diving, naval salvage, and offshore pipeline inspection operations.
| Type | Coax | Power | Depth | OD (mm) | BS |
|---|---|---|---|---|---|
| Shallow RG59 | 21AWG 75Ω | Optional 2–4C | 200 m | 7.7 | Jacket only |
| Shallow RG6 | 19AWG 75Ω | Optional 2–4C | 200 m | 8.6 | Jacket only |
| Mid RG59 | 22AWG 72Ω | Optional power | 3,000 m | 7.7 | Kevlar 2,400 lbs |
| Deep Mini RG59 | 26AWG 75Ω | Optional | 7,000 m | 5.6 | Kevlar 1,200 lbs |
| Deep RG59 | 23AWG 75Ω | Optional | 7,000 m | 7.0 | Kevlar 2,400 lbs |
| Deep RG11 | 18AWG 75Ω | Optional | 7,000 m | 10.3 | Kevlar 2,400 lbs |
| SS Armoured | Custom 75Ω | 2–4 power cores | 500 m | 9–16 | SS braid 1,000 lbs |
| Camera combo | RG59 | 2–16AWG lighting | 300 m | 11–15 | Kevlar 2,400 lbs |
Maintain a minimum bend radius of 10× OD for dynamic applications (ROV drums, diver handling). Static bend radius minimum is 6× OD. Excessive bending distorts the coaxial geometry — increasing capacitance per unit length and causing measurable signal loss increase at the bend point, particularly critical for HD-SDI signals operating close to cable length limits.
Coaxial termination quality is critical for HD-SDI performance. Use impedance-matched BNC or Micro BNC connectors for surface equipment. For underwater-mateable video connectors, follow connector manufacturer torque specifications. Ensure the coaxial shield is continuous from conductor to connector backshell — any break in shield continuity creates an RF leak point and a potential corrosion initiation site.
Before deploying to depths greater than 200 m, measure cable insertion loss and return loss with a vector network analyser (VNA) or dedicated coaxial cable tester. For HD-SDI, inject a test signal and verify eye diagram integrity at the receive end. Any deviation from baseline measurements indicates damage, connector failure, or jacket compromise that must be resolved before deep deployment.
Tell us your depth, video standard (CCTV/SDTV/HD-SDI), power requirements, break strength, and operating temperature — we supply the exact subsea video cable for your camera, ROV, or inspection system.
75-Ohm precision | 7,000 m depth | Custom lengths & configurations
