Services

Rig Positioning

Personnel, positioning equipment, computers and advanced positioning softwares are available to position exploration drilling rigs precisely on to new locations. In addition, tracking systems have been developed for the positioning of anchor handling tugs and other ancillary vessels.

Positioning for VSP Surveys

A navigation package with unique software, which offers a flexible system, configured to suit VSP acquisition surveys.

Geophysical Surveys

Dedicated site survey vessels equipped with high resolution multi-channel geophysical acquisition system are rapidly mobilized and operated to check for the presence of shallow gas deposits and other hazards at proposed drilling sites. High quality mapping and interpretation services (including 3D) are available.

Seismic Vessel Positioning

CNAV Provides the seismic vessel operator with global coverage DGNSS navigation service. For 3D surveys, advanced products under continuos development enables the positions of the streamer tail buoys to be continuously monitored.

for field development & production

We provide a full range of survey services to support all phases of offshore construction projects.

Engineering Studies

Seabed and substrata studies are vital to the planning, design and construction phases of any offshore development. Vessels, personnel and equipment are provided to locate any potential engineering hazards such as structural faults, gas pockets, reefs and man-made obstructions.

Pipeline Survey

All phases of the complete pipelay programme including route reconnaissance studies, pipeline route survey and surveys during pipelay operations and pipeline inspections are undertaken. Detailed studies are conducted prior to pipelay operations. These surveys chart water depths and locate suitable sea floor characteristics for optimum pipeline route selection.

Pipeline Inspection

As-laid and as-trenched surveys are conducted using towed geophysical sensors or ROV's equipped with sensors to measure pipe burial depths, spud scan and free spans.

Platform & Underwater (SUBSEA) Installations

We provide assistance with the installations of platforms, jacket sections and templates in offshore hydrocarbon provinces. We integrate surface and sub-surface positioning data to generate graphics showing the position, yaw, pitch, roll and depth of the structure being lowered and levelling information when it is on the seabed.