Our Services

Quasar Subsea Service

Providing sustainable solutions and services for the oil and gas industry.

What we do

Quasar Subsea Services are a leading provider of subsea services, general survey services. We bring extensive expertise, innovative solution and cutting-edge technology to every project.

General Seabed Survey

We offer surveys involving geotechnical data acquisition, environmental data acquisition, data processing, Suitable designed Seabed mapping system Charting and reporting.

Bathymetric Data Acquisition
Quasar Subsea has a long track record of collecting bathymetric data, using the latest Multi-Beam Echo Sounders (MBES), whether it be ROV-based or over-the-side pole-based systems. Offshore applications such as trenching (pre-cut, pre-lay, post-lay and intermediate surveys), dredging (pre, post and real-time surveys), sonar/acoustic pipeline inspection, site surveys, or any requirement for a map of the seabed, can be supported with a suitably designed mapping system.


Geotechnical Data Investigation
We offer ground truthing of geophysical data in the form of Cone Penetration Testing (CPT), Vibrocore, Gravity/Piston core, box core and grab sampling. Geotechnical acquisition is offered as an integrated or independent service to suit our clients’ needs.


Environmental Data Acquisition
Environmental data acquisition services comprise; stills camera / video and seabed sampling to meet our client’s environmental baseline and habitat assessment requirements.

General Seabed Survey

Data Processing, Charting and Reporting
Supporting all elements of data acquisition both during seabed mapping and route surveys, we offer data processing, charting and reporting of the acquired data. We provide clients with the tools and personnel needed to perform data processing, either onboard the vessel or using the Quasar office facilities.

We use the Eiva NaviSuite, Sonarwiz, Qinsy QPS, and Qimera together with supplementary tools such as ArcGIS, QGIS and CAD-based charting, all to industry standards. We can provide USBL and DVL positioning post-processing, powerful INS post-processing and automated multi-beam echo sounder data cleaning, all tools which increase the quality of data and increase efficiency to save valuable time.

Route survey

We offer route surveys involving geophysical data acquisition, side scan sonar data acquisition and sub-bottom profiler data acquisition.

Geophysical Data Acquisition
Which utilises multibeam echosounder (MBE), side scan sonar (SSS) and sub bottom profiler (SBP) systems to carry out route surveys prior to cable and pipeline laying operations, or subsea construction projects.

Side Scan Sonar Data Acquisition
We provides services to acquire high quality Side Scan Sonar (SSS) data. SSS data is used to provide highly detailed imagery of the seabed and potential debris. We can provide either ROV, pole-mounted or more traditional towed SSS systems. For towed systems, We can provide the client with all the equipment and solutions needed, including winch system, depth sensor, vessel positioning and optionally USBL positioning of the SSS fish.

Quasar Subsea uses industry standard system and processing tools, and is able to deliver data in most known formats, depending on customer’s requirement. Typical uses include debris survey, customer seafloor classifications and bathymetric data based on return signal.

Route survey

Sub-Bottom Profiler Data Acquisition
We provide services to gather and provide high quality sub-bottom profiler (SBP) data, using pole mounted or towed sensors. Sub-bottom profilers use low frequency acoustics to penetrate into the seafloor. Quasar Subsea is able to deliver data acquired with sub-bottom profilers to customers in most known formats.

Typical uses include detecting top layer thickness, pipe/cable detection, buried objects and customer geological and geophysical analysis.

Cable Installation Support

Survey and positioning support for the full cable installation process.

Quasar Subsea can provide survey and positioning support for the full cable installation process. Prior to operations, we can perform route surveys; the results of which help to inform suitability for laying operations. During laying operations we can assist with real-time calculations of cable parameters. Post-laying, we can provide as-laid surveys to record the pipeline/cable status and position immediately after it is laid.

Quasar Subsea supplies ROV mounted cable and pipe trackers together with subsea positioning, video and/or multi-beam echo sounders, all with easy integration to GIS (Geographical Information Systems).

Quasar Subsea uses industry standard system and processing tools, and is able to deliver data in most known formats, depending on customer’s requirement.

Cable Installation Support

Quasar Subsea supplies in-house hardware and software to provide real-time calculations of cable parameters during cable lay operations. Our cable lay software uses catenary calculations and provides simultaneous calculations of cable parameters based on one or all of the following:

  • Tensioner on chute
  • Cable inclinometer
  • ROV monitoring of touchdown
The derived cable parameters are:
  • Tension on chute (max tensions)
  • Tension on seabed
  • Minimum bending radius
  • Length of cable catenary

Quasar Subsea has well established routines and very experienced surveyors to support any cable lay operation.

Inspection, Repair, Maintenance (IRM)

IRM and O&M (operations and maintenance) services are in increasing demand.

Inspection, Repair, Maintenance (IRM) is becoming a bigger element of many existing fields, and Quasar Subsea is well placed to support such operations. These tasks can be provided stand-alone or as part of an integrated service to the end client. IRM and O&M (operations and maintenance) services are in increasing demand, particularly in existing, more mature fields. Quasar Subsea has an exceptional track record in both of these areas, and we can confidently support such operations.

Rig & Mooring

Offering specialist survey and positioning services to support international marine construction projects, offshore cable operations, rig and mooring operations and seabed surveys

Quasar Subsea has a long track record of positioning jack-up rigs alongside existing structures and in open locations. We have well proven standardized solutions based on Global Navigation Satellite System (GNSS) positioning in combination with relative positioning systems.

These include robotic total stations and / or real-time kinetic GNSS which are used to navigate the rig in a safe and controlled manner. Prior to a rig move, Quasar Subsea can also offer a full dimensional control survey, prism installation and datum point establishment on existing structures or platforms.

Standardized mobilization reports and rig move survey reports are provided, containing calibrations, verifications and as-built data to provide the client with easy to understand data and positions.

Semi-Sub Rig Moves

Positioning semi-submersible rigs safely on to location.

Quasar Subsea has well proven, extensive experience in positioning semi-submersible rigs safely on to location. As with jack-up rigs, we offer effective solutions based on GNSS to navigate the rig in a safe and controlled operation.

Pre-laying anchors using an AHV and an ROV prior to the actual rig move is now the default method, but we continue to support traditional rig moves.

A standardized mobilization report and rig move survey report are provided, containing required calibrations, verifications, as-built data and anchor catenary calculations

FPSO & Mooring Operations

Offering survey, monitoring and calibration support for FPSO and mooring operations.

Where an FPSO is being moored either during initial hook-up, re-instatement, mooring modifications, or rigs are skidding their position on existing moorings,

Quasar Subsea can provide:

  • Survey and positioning support during FPSO installations
  • Rig gyro calibrations