ROV
Survey
&
Inspection
Services

The core principle of ROV survey is straightforward: remove the human from the hazardous environment. For confined spaces, deep water, high-current locations, and any situation where diver access is impractical, unsafe, or uneconomical, a remotely operated vehicle delivers high-quality visual and sensor data without placing personnel at risk. It is an approach that has become the operational standard across offshore oil and gas, water utilities, port and harbour management, and subsea infrastructure maintenance worldwide.

Silvercrest Submarines operates one of the broadest ROV inventories available from a single operator — over 50 systems spanning Micro/Eyeball, Inspection/Observation, and Work Class categories. That depth of inventory means the right platform can be matched to almost any inspection requirement: from the AC-ROV SP-50, whose 190mm fly-through diameter and sub-15kg total system weight make it deployable by a single operator into confined culverts and intake structures, through to work class ROVs rated beyond 3,000 metres (9,843ft) for the deepest offshore inspection work.

ROV survey encompasses visual inspection via HD camera, sonar-based structural assessment, sensor-driven condition monitoring — including cathodic protection survey, ultrasonic thickness gauging, and metal detection — search and recovery operations, and environmental monitoring programmes. With over three decades of operational experience in ROV deployment, subsea engineering, and subsea motor manufacture, Silvercrest Submarines brings a level of technical understanding to inspection work that extends well beyond equipment supply.

This page covers ROV-specific survey and inspection capability. For operations where a manned platform offers advantages — wide-area seabed survey, visual assessment requiring human judgement, or operations where diver accompaniment is operationally preferred — see our Submarine Survey & Site Assessment page. For the full survey capability overview, visit the Subsea Surveys hub.

When An ROV Is The Right Survey Platform

Choosing between an ROV, a manned submarine, or a diving team is a genuinely important project decision, and the right answer is not always the same. The guidance below is intended to help buyers arrive at the most appropriate platform before committing to a mobilisation.

The environment is confined or physically inaccessible to a manned platform. Pipelines, culverts, dam intake structures, water supply tunnels, penstock shafts, and enclosed tank internals require a compact, highly manoeuvrable system. The AC-ROV SP-50's 190mm fly-through diameter is the clearest illustration of what this means in practice: it can enter spaces that no human diver, no submarine, and no larger ROV could access without structural intervention. When confined access is the primary challenge, a micro/eyeball class ROV is almost always the correct answer.

No human presence at depth is required or desirable. For routine condition monitoring, regulatory compliance inspection, and data-gathering surveys in open water, removing personnel from the underwater environment is both a safety improvement and a direct cost reduction. ROVs operate effectively in contaminated water, in strong tidal currents, and in environmental conditions that would preclude dive operations entirely - reducing both risk and weather downtime.

Extended umbilical runs are operationally necessary. Long pipeline surveys, water supply tunnel inspections, and outfall assessments benefit from fibre optic umbilicals that deliver high-definition video over distances where a conventional tethered approach would be impractical. The Seamor 300F2/4's motorised slip-ring drum with 2,000m (6,562ft) fibre optic cable option is an engineering response to exactly this challenge - a platform built around the umbilical management demands of tunnel inspection rather than adapted for it.

The survey requires extended station-keeping in a specific location. ROVs can hold position on a structure for extended periods without the endurance or decompression constraints that govern diver operations. For detailed structural inspection of a specific asset - a pipeline joint, a jacket node, a gate mechanism - this is a material operational advantage.

Mobilisation speed and cost efficiency are primary drivers. Compact inspection and micro/eyeball class ROVs can be transported in a standard vehicle, deployed by a small crew or a single operator from a quayside or small workboat, and be fully operational within minutes of arriving on site. For routine inspection programmes - particularly for inland water infrastructure, utilities assets, or port structures - this mobilisation efficiency produces meaningful savings over the course of a programme.

The survey requires a specialist sensor payload. Metal detection, profiling sonar, grabbers, manipulators, and cathodic protection probes can all be integrated into appropriate ROV platforms across the Silvercrest Submarines inventory. Where the inspection task demands a specific sensor rather than general visual survey, platform selection and sensor fit-out are addressed together.

When the survey requirement points instead towards wide-area seabed coverage, human situational judgement, or a combination of survey and passenger observation, a manned submarine may be the more effective platform. The Submarine Survey & Site Assessment page covers those scenarios in detail.

Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef

ROV Survey Applications & Environments

Silvercrest Submarines' ROV inventory covers the full range of subsea inspection environments. The applications below represent the principal areas of deployment across the fleet.

Offshore Oil & Gas

Platform jacket inspection, riser surveys, pipeline free-span assessment, subsea tree and manifold condition checks, IRM (inspection, repair and maintenance) support, mooring system inspection, and FPSO and FSO hull surveys are among the most demanding ROV inspection tasks in terms of depth, current exposure, and documentation requirements. Work class ROVs rated to 3,000+ metres (9,843ft+) handle the deepest offshore installations; inspection class systems address nearshore pipelines, shallow platform foundations, and fixed structures in the 100–600 metre (330–1,969ft) range.

Silvercrest Submarines' supply relationships with leading offshore contractors — including Subsea7, Fugro, Saipem, CTC Marine Projects, SMD Hydrovision, Canyon Offshore, Sonsub, and others - reflect the company's position as a serious participant in the offshore ROV supply chain rather than a peripheral equipment provider.

Pipeline & Subsea Cable Survey

Route surveys, burial verification, span and free-span assessment, damage investigation, marine growth assessment, and cathodic protection survey across both flexible and rigid pipelines, and subsea power and communications cables. Fibre optic umbilicals - such as the 915m and 2,000m options available on the Seamor 300F2/4 - support long-range pipeline inspection from a single stationary deployment point, significantly reducing vessel time and operational cost on extended pipeline routes.

Dam, Reservoir & Freshwater Infrastructure

Dam face condition assessment, gate and valve mechanism inspection, intake structure survey, penstock and surge shaft examination, scour and sediment accumulation assessment, and spillway condition monitoring. ROVs are the operationally sound alternative to diver access in freshwater environments where confined geometry, contaminated water, or site safety constraints make diving impractical or unacceptable.

The AC-ROV SP-50's 190mm fly-through diameter enables access to intake culverts and gated structures that cannot be inspected by any other means without dewatering - a significant cost and programme time saving for water utilities and dam operators. For longer tunnel and shaft sections, the Seamor 300F2/4 with its motorised fibre optic umbilical drum provides the extended-reach capability that tunnelled infrastructure demands.

Port, Harbour & Maritime Infrastructure

Quay wall and sheet pile condition assessment, berth surveys, bridge pier and abutment inspection, navigation aid condition monitoring, dolphin and mooring structure surveys, fender condition assessment, and scour investigation. Compact inspection ROVs deploy efficiently from a quayside or small support vessel without disrupting port operations, making them particularly suitable for routine inspection programmes in busy commercial ports where operational downtime has a direct financial cost.

Tunnel & Confined Infrastructure Inspection

Water supply tunnels, outfall inspection, storm overflow surveys, and other long-run confined water infrastructure present specific challenges that purpose-built platforms address more effectively than adapted open-water systems. The Seamor 300F2/4, with its four rearward thrusters configured specifically to manage the drag of a 2,000m (6,562ft) umbilical, is a system designed around this application rather than modified for it. Its motorised slip-ring drum handles umbilical management through extended tunnel sections without the twist and drag problems that affect conventional ROV deployments in confined, long-run environments.

Search, Recovery & Security Operations

Metal detection-equipped ROVs support underwater search operations, asset location, wreck survey, insurance loss assessment, and evidential documentation. The Deep Ocean Engineering Triggerfish T4H carries the JW Fishers RMD-1 ROV-mounted metal detector, making it a dedicated search platform for locating metallic objects on or beneath the seabed. It is also used in port security monitoring, coastguard and police search support, and anti-piracy and maritime security surveillance.

Note: the Triggerfish T4H is a specialist search and detection platform - it does not carry camera or sonar systems. For combined visual survey and metal detection capability, Contact us to discuss the appropriate platform configuration.

Environmental & Scientific Survey

Marine habitat assessment, environmental impact baseline surveys, species monitoring, sediment sampling support, and oceanographic data collection. HD cameras and optional sonar on observation class ROVs provide the coverage quality and documentation standard that environmental programmes require, with the non-intrusive low-disturbance profile that sensitive habitat surveys demand.

Hull Inspection

Vessel hull condition surveys for insurance purposes, pre-purchase assessment, regulatory compliance, and maintenance planning. ROV inspection avoids the cost and scheduling disruption of dry-docking for routine condition checks, and produces documented video evidence of hull condition that satisfies classification society and insurer requirements.
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef

ROV Classes & Capability Overview

Silvercrest Submarines' inventory of over 50 ROV systems spans three distinct operational classes. Understanding which class fits a given inspection requirement is the first step in platform selection.

Micro / Eyeball Class ROVs

The smallest and most rapidly deployable survey platforms in the fleet. Total system weights typically under 15kg; transportable in a standard vehicle; deployable by a single operator from a quayside, a small workboat, or even directly from the bank of an inland waterway. No crane, no support vessel, and no large crew are required.

The AC-ROV SP-50 is the clearest example of what this class delivers: a total system weight under 15kg, a 190mm fly-through diameter on a 50m HD-camera tether, and the ability to enter intake culverts, pipelines, and confined access structures that no other type of platform can inspect without structural intervention. Rapid mobilisation and low operational overhead make micro/eyeball class ROVs the first choice for routine utilities inspection, dam and reservoir survey, confined infrastructure, and any application where access geometry is the primary operational constraint.

Micro / Eyeball Class ROVs

Inspection / Observation Class ROVs

Mid-capability platforms carrying HD cameras, variable-intensity lighting, sonar, and optional sensor payloads including grabbers, manipulators, and specialist detection equipment. Depth ratings in this class typically range from 100 to 600 metres (330–1,969ft), covering the majority of coastal infrastructure, nearshore offshore structures, port and harbour assets, and inland deep-water sites.

The Seamor 300F2/4 represents the specialist end of this class - a purpose-built tunnel inspection vehicle with high-resolution colour camera, additional LED lighting, grabber arm, sonar profiler option, and a motorised slip-ring drum accommodating either 915m (3,002ft) or 2,000m (6,562ft) of fibre optic umbilical. The Ageotec Perseo, rated to 600m (1,969ft) with a 450m umbilical on winch, provides a further inspection-class option for nearshore and offshore structural inspection.

Inspection class ROVs balance capability, mobilisation efficiency, and operational cost for the majority of infrastructure inspection requirements, and represent the most frequently deployed category across Silvercrest Submarines' survey operations.

Inspection / Observation Class ROVs

Work Class ROVs

Heavy-duty systems rated to 3,000+ metres (9,843ft+) with hydraulic tooling, heavy-lift capability, and the thruster power to hold station in strong offshore currents. Suited to deepwater platform inspection, pipeline installation support, subsea intervention, FPSO hull survey, and the most demanding IRM operations in the offshore sector.

Silvercrest Submarines' work class inventory, combined with the company's subsea motor manufacturing capability - motors rated from 24V to 6,600V, depth-rated to 4,000 metres (13,123ft) at the Australian manufacturing facility - means the company understands the engineering demands of work class ROV operation at a level that goes well beyond equipment hire.

Work Class ROVs
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef

Sensor Payloads & Survey Equipment

Survey ROV deployments are defined as much by sensor configuration as by the vehicle itself. The following sensor and tooling configurations are confirmed across the Silvercrest Submarines inventory.

Confirmed sensor and tooling across the fleet:

  • HD and high-resolution colour cameras - standard across all classes; multiple camera systems on larger platforms
  • Variable-intensity LED lighting - standard on inspection and work class systems; 20W halogen on VideoRay Scout (Micro class)
  • Profiling sonar and obstacle avoidance sonar - confirmed on the Seamor 300F2/4; measuring function with multiple range and resolution settings
  • Grabber / manipulator arms - confirmed on the Seamor 300F2/4 and selected other systems
  • JW Fishers RMD-1 ROV-mounted metal detector - confirmed on the Triggerfish T4H; specialist search and detection deployment
  • Rear-facing camera - confirmed on the Seamor 300F2/4 for umbilical monitoring in confined access
  • Fibre optic umbilicals - confirmed on the Seamor 300F2/4: 915m (3,002ft) and 2,000m (6,562ft) options on motorised slip-ring drum; provides high-definition video over extended umbilical runs without signal degradation

Available on selected systems — contact Silvercrest Submarines to confirm availability for your specific application:

  • Cathodic protection (CP) survey probes
  • Ultrasonic thickness (UT) gauging for hull and structural steel assessment
  • Flooded member detection (FMD)
  • USBL underwater positioning
  • Multibeam sonar for three-dimensional seabed mapping

For applications requiring a specific sensor configuration, Silvercrest Submarines advises on the appropriate platform and fit-out before mobilisation. Contact us with your inspection environment, target depth, access constraints, and data requirements.

Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef

Survey Planning & Operational Support

ROV survey is more than deploying a vehicle. The pre-deployment process — platform selection, sensor configuration, mobilisation logistics, and operational planning — determines whether a survey programme delivers usable, defensible data efficiently or generates costly delays and re-mobilisations.

ROV Selection Advice

Silvercrest Submarines provides honest guidance on which ROV class and configuration is appropriate for a given inspection environment, depth, and data requirement. That includes straightforward advice on when a manned submarine, a diving team, or a different approach altogether may be more suitable than an ROV. The Submarine Survey & Site Assessment page covers manned platform survey in detail.

Mobilisation Planning

Support vessel requirements, deployment method (quayside, small workboat, offshore support vessel), equipment logistics for remote or international locations, and operational planning for challenging access environments. For micro and inspection class deployments, Silvercrest Submarines' systems are designed to minimise support infrastructure and mobilisation overhead.

ROV Pilot Provision

Experienced ROV pilots are available for charter deployments across the inventory. Pilots are familiar with the specific handling characteristics and sensor interfaces of each system in the fleet.

Pilot Training

On-site ROV pilot training is available worldwide for clients operating their own platforms. Training can be delivered at the client's site or at a Silvercrest Submarines facility.

Sensor Configuration

Pre-deployment selection and configuration of sensor payloads for the specific survey application, ensuring the data output meets the client's reporting and evidence requirements before mobilisation.

ROV Maintenance & Repair

Video footage, condition assessment reports, sonar data processing, and engineering analysis support on request.

Post-Survey Support

Between-survey maintenance, fault diagnosis, repairs, and full refurbishment are available for Silvercrest Submarines' own charter fleet and for client-owned platforms. See the ROV Repairs & Refurbishment page for details.
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef

Why Silvercrest Submarines For ROV Surveys

The case for Silvercrest Submarines as an ROV survey operator rests on a small number of genuinely differentiating facts rather than marketing generalities.

Inventory breadth. Over 50 ROV systems spanning all three operational classes means Silvercrest Submarines can field the right platform for almost any inspection requirement without compromise. Many operators are constrained to one or two platforms and adapt the brief to fit the equipment. Silvercrest Submarines' inventory runs from a 190mm-diameter, sub-15kg micro ROV to 3,000-metre-rated work class systems - a range that very few single operators can match.

Supply chain position. Silvercrest Submarines' subsea motor manufacturing and supply relationships with Subsea7, Fugro, Saipem, CTC Marine Projects, LD Travocean, SMD Hydrovision, Sonsub, Canyon Offshore, MTQ, Petronas, Saudi Aramco, and Woodside are not peripheral associations. They reflect the company's integration into the offshore ROV sector at the component level — understanding ROV systems from the motor outward rather than from the operator manual inward.

Manufacturing depth. Silvercrest Submarines manufactures subsea electric motors rated from 24V to 6,600V, depth-rated to 4,000 metres (13,123ft), at its Australian facility. That engineering capability informs every aspect of ROV selection, operation, and maintenance advice.

Repair and refurbishment capability. Survey ROVs maintained to operational standards between deployments deliver reliable data. Silvercrest Submarines' ROV repair and refurbishment capability ensures charter systems are not fielded with deferred maintenance.

Over three decades of operational experience. Silvercrest Submarines has been operating, supplying, and engineering ROV systems for over three decades. The company's competitors in the consumer submersible sector focus principally on manned luxury submersibles. Silvercrest Submarines operates across the full spectrum from a 15kg eyeball ROV to 3,000-metre work class systems, in survey environments that have nothing in common with superyacht recreation.

Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef
Drawing of An Eco Sub At A Coral Reef

Frequently Asked Questions About ROV Surveys & Site Assessments