Survey & positioning
Technical support for vessel and subsea positioning systems, sensor configuration and integration into the survey spread.
Independent technical consultancy
Technical clarity.
Offshore confidence.
Practical support for offshore survey, positioning and subsea systems — from project preparation to mobilisation and operations.
Survey & positioningROV integrationVessel mobilisationOffshore IT
About Callum Malley Ltd
Hands-on experience.
Clear technical direction.
Callum Malley Ltd is led by Callum Malley, a survey systems specialist with a practical background in offshore survey equipment, ROV sensor integration, vessel mobilisation and positioning systems.
Callum began working with survey equipment at Subsea Technology & Rentals in 2018, building experience in testing, maintenance, calibration and mobilisation. He went on to work as a Senior Survey Engineer with Beam / Rovco before moving into survey technical lead work.
His experience spans onshore preparation and offshore operations, including acoustic positioning, INS/DVL, multibeam systems, survey networks and ROV-mounted sensors. He also prepares mobilisation plans, FAT reports, technical procedures, wiring diagrams and system layouts.
Clients work directly with Callum for focused technical support: reviewing system interfaces, identifying integration risks and preparing equipment and documentation for mobilisation.
Equipment foundationsTesting, maintenance & integration
Offshore deliverySurvey engineering & mobilisation
Technical leadershipReadiness, planning & documentation
Callum at an offshore survey workstation. Screen displays are illustrative.
What we do
The systems behind
a successful operation.
Callum Malley Ltd provides independent offshore survey and subsea technical consultancy across the offshore energy sector. Support is tailored to the scope, whether you need help with a specific technical issue or a wider mobilisation.
ROV sensor integration
Support with ROV survey sensors, interfaces and tooling requirements for inspection and subsea survey operations.
Mobilisation & commissioning
Vessel mobilisation planning, system installation and commissioning support to prepare equipment for offshore operations.
Offshore IT & networks
Survey workstations, networks and offshore IT infrastructure designed around acquisition and operational requirements.
System layouts & integration drawings
Wiring and interconnection diagrams, equipment layouts and rack arrangements to support system integration, mobilisation and maintenance.
Technical procedures & operational documentation
Mobilisation and commissioning procedures, equipment checklists, toolbox talks (TBTs) and support with task-specific risk assessments.
Technical work examples
From subsea systems
to the detail behind them.
A selection of offshore equipment, rack infrastructure and technical layout examples.
ROV systems & sensor integration
Technical focus: ROV-mounted sensors, positioning interfaces, multiplexers and tooling integration for offshore survey operations.
Rack infrastructure & equipment integration
Technical focus: rack-mounted workstations, network switches, cable routing and equipment arrangements for mobilisation.
Physical rack layouts & technical drawings
Rack elevation prepared by Callum, showing equipment placement, mounting arrangements and power distribution. Anonymised portfolio example.
Project support
Support where
your project needs it.
Bring focused technical input into the stage that matters — from defining a survey spread to resolving integration issues during mobilisation.
Talk through your scope ↗01
Define the requirement
Review the scope, interfaces and operational constraints, including equipment and documentation readiness checks to identify gaps before mobilisation.
02
Prepare & integrate
Support equipment planning, installation and system commissioning.
03
Support operations
Provide practical technical input for system readiness, troubleshooting and delivery.
Let's talk
Have a technical scope
to work through?
Send a brief outline of your project, the support required and your anticipated dates to discuss scope and availability.
Callummalleyltd@outlook.com ↗
Onshore & offshore · Contract-based consultancy