SEAMOR Steelhead — Portable 300 m Inspection-Class ROV
Inspection-Class ROV
SEAMOR's portable inspection-class ROV — light enough for one-person deployment from a dock or small boat, with a broadcast-quality colour zoom camera, 3,000-lumen lighting and auto depth & heading hold for steady work in confined water.
The ROV one person can carry to the water
The Steelhead is built for fast, repeatable inspection work. At roughly 21 kg it launches directly from its tether — one operator can move it from the van to the waterline and be diving within minutes. Onboard auto depth and heading hold keep it steady in confined spaces so the pilot can concentrate on the inspection, not on fighting drift.
- ~21 kg frame — true one-person, tether-launch deployment
- 300 m (1,000 ft) depth rating
- Four variable-speed thrusters with auto depth & heading hold
- Broadcast-quality colour zoom camera with full sensor overlay
- 3,000 lumens of dimmable LED light, integrated 15" LCD console
- Leak detection and temperature monitoring as standard
The friction the Steelhead removes
Routine underwater inspection is slowed by the same recurring obstacles. The Steelhead is designed to make each one disappear.
🏗️ Mobilisation Cost
Cranes, hoists and big vessels are expensive to mobilise for a quick look. One person and a tether-launch ROV replace all of it.
🤿 Confined Access
Tanks, pens, intakes and pilings are tight and hard to reach. A compact 21 kg frame goes where divers and larger ROVs can't.
👷 Diver Risk
Cold, current and zero-visibility water put divers at risk for routine checks. The Steelhead keeps people topside.
📋 Documentation
Inspections need defensible records. On-screen depth/heading overlay and onboard DVR produce report-ready footage automatically.
Intuitive Flight. Automatic Station-Keeping.
Four variable-speed thrusters deliver smooth, responsive handling, while onboard auto depth and heading hold free the pilot to focus entirely on the inspection.
Steady framing, hands-free station-keeping
Four thrusters with individual variable-speed control give precise positioning in confined spaces and restricted flow. Pressure sensors lock a set depth and the onboard compass holds heading — so the Steelhead delivers consistent, repeatable framing for video documentation without the pilot fighting vertical drift or current.
- Auto depth hold locks the vehicle at a set depth
- Auto heading hold keeps a stable bearing in current
- Tether-launch deployment — no hoist or crane required
4 Variable-Speed Thrusters
Responsive directional movement and precise positioning in confined and current-prone water.
Auto Depth Hold
Pressure sensors lock the ROV at a set depth so the pilot steers without fighting drift.
Auto Heading Hold
Onboard compass maintains a stable heading for consistent framing and documentation.
Tether-Launch Deploy
The compact 21 kg frame launches straight from the tether — ideal for docks and small vessels.
Broadcast-Quality Colour Video. 3,000 Lumens.
Clear, detailed underwater imagery with a 3× optical zoom colour camera, onboard DVR and a 3,000-lumen dimmable LED system — everything needed for professional inspection documentation.
See the detail, record the evidence
The broadcast-quality colour camera resolves cracks, corrosion and marine growth without repositioning the vehicle, and the onboard digital video recorder captures every pass with depth, heading, pitch/roll and timestamp burned into the frame — defensible documentation straight off the dive.
- 3× optical / 32× total zoom, manual or automatic focus
- Two 1,500-lumen dimmable LEDs (3,000 lm total), stepless control
- Onboard DVR with live depth/heading/timestamp overlay
- Integrated 15" LCD console included as standard
3× Optical / 32× Zoom
Broadcast-quality colour camera resolves close-up detail without moving the ROV — ideal for crack detection and corrosion assessment.
Manual & Auto Focus
Switch focus modes on the fly. Overlay records depth, heading, pitch/roll and timestamp for full inspection record-keeping.
Dual 1,500-Lumen LEDs
Two independent dimmable LEDs (3,000 lm total) with stepless brightness, plus integrated controller and 15" monitor.
Digital Video Recorder
Records continuously with overlay — ready-to-use documentation with no post-processing required.
Optional Parallel Lasers
Green laser scale on a 150 mm baseline for accurate size measurement directly from the video.
Leak & Temperature Sensing
Built-in leak detection with audible alarm and temperature monitoring protect the vehicle and enable safe recovery.
Expand the Steelhead's Capability
A full range of SEAMOR accessories configures the Steelhead for intervention, enhanced lighting, tether management and handheld control — all designed to mount and integrate seamlessly.
Dual Function Gripper
360° continuous wrist rotation, 90 mm jaw opening. Optional cutter severs fishing line, netting and small rope. Anodized 6061-T6 aluminium, 300 m rated.
Handheld Control Pendant
Ergonomic Logitech F310-based pendant for intuitive handheld operation. Plug & Play, seamless switching with the console. 180 g, RS-232, 7–36 VDC wide input.
Auxiliary Camera
Repositionable 40 mm colour or B&W camera — 92° FOV, 160 lm LEDs, <0.01 lux sensitivity, 600 m rated. A second viewing angle for tight spaces.
Auxiliary Light
Compact 40 × 50 mm unit delivering 1,000 lm at 5,500 K cool white, 125° beam. 600 m rated, 24–48 VDC. Eliminates camera shadowing in low light.
Sea Otter Reel
High-grade aluminium and stainless tether reels — Sea Otter 50 and 100. Removable waterproof hub enclosure, open or Pelican-case configuration.
Sonar & USBL Integration
Compatible with a range of imaging sonars and USBL positioning systems for navigation, target detection and survey in zero-visibility conditions.
Where the Steelhead Excels
Portable, stable and quick to deploy — the Steelhead is built for routine inspection across infrastructure, aquaculture, research and security work.
Bridge & Pier Inspection
Fast condition checks of piers, pilings and substructures with overlay-documented HD video.
Aquaculture Monitoring
Net-pen, mooring and stock inspection without divers — drop alongside and start filming.
Dam, Hydro & Reservoir
Intake, trash-rack and potable-water reservoir inspection without dewatering or diver entry.
Search & Recovery
Rapid-deploy search of harbours and shallows, with optional gripper for light recovery.
Hull & Harbour Survey
Hull, keel and harbour-infrastructure inspection from a dock or small workboat.
Marine Research
Stable, repeatable observation platform for survey, sampling and environmental work.
Steelhead — Full Specs
General ▾
| Max depth | 300 m (1,000 ft) |
| Weight in air | ~21 kg (47 lbs) — trimmed for fresh water |
| Dimensions (L×W×H) | 502 × 384 × 373 mm (19.8" × 15.1" × 14.7") |
| Diagonal | 515 mm (20.3") |
| Construction | Anodized aluminium, stainless steel, syntactic foam, marine-grade polymers |
Propulsion ▾
| Thrusters | 4 (two horizontal + two vertical/lateral), variable speed |
| Max speed | 1.75 knots (configuration dependent) |
| Protection | Built-in short-circuit protection per channel |
| Auto functions | Auto depth hold, auto heading hold |
| Deployment | Tether-launchable — no hoist required |
Camera & Lighting ▾
| Type | Broadcast-quality colour zoom (NTSC / PAL) |
| Zoom | 3× optical / up to 32× total |
| Tilt | ±90° |
| Focus | Manual and automatic |
| Lights | 2 × 1,500 lm (3,000 lm) dimmable LED |
| Lasers | Optional parallel green lasers, 150 mm baseline |
| Overlay | Depth, heading, pitch/roll, tether turns, timestamp |
| Recording | Digital video recorder included |
Auxiliary Camera (Option) ▾
| Type | Colour or black & white, low-light |
| Format | NTSC / PAL |
| Focus | Fixed |
| Lights | 2 × 1,500 lm, on/off control |
Tether & Communication ▾
| Tether diameter | 10 mm (0.4") |
| Tether lengths | 165 m (540 ft) and 335 m (1,100 ft) standard |
| Breaking strength | 700 kgf, Kevlar reinforced |
| Buoyancy | Neutrally buoyant in fresh water |
Sensors & Safety ▾
| Depth/pressure sensor | Yes |
| Compass | Yes |
| Pitch & roll sensors | Yes |
| Leak detection | Yes — audible alarm (electronics & camera canisters) |
| Temperature monitoring | Yes |
Control System ▾
| Control console | Pelican-case mounted controller with 15" LCD monitor |
| Recording | Built-in digital video recorder |
| Optional | Handheld control pendant, high-brightness monitor |
Steelhead vs. the SEAMOR Range
Choose the right platform for your depth, payload and operational requirements.
| Specification | Steelhead | Chinook | Mako | ORCA |
|---|---|---|---|---|
| Max depth | 300m | 300 / 600m | 300 / 600m | 300 / 600 / 1,000m |
| Weight | 21 kg | 33 kg | 72 kg | 60 kg |
| Max speed | 1.75 knots | 2 knots | 2 knots | 3 knots |
| Thrusters | 4 | 2–6 | 8 | 8 (vectored) |
| Payload | — | — | 14–22.5 kg | Up to 20 kg |
| 6 DOF control | — | Configurable | Yes | Yes |
| Tether (standard) | 165–335m | 335–625m | 335–625m | TBC |
| Best for | Lightweight inspection | Versatile workhorse | Heavy tooling & sonar | Utility / all-mission |
Request a Steelhead Quote
Tell us about your inspection application and we will prepare a tailored quote within one business day. As your authorised SEAMOR distributor for the Nordic and European region, SepcoTech provides local sales, technical support and after-sales service.
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