Hydrographic Survey for Nautical Charting


A-2-Sea specialises in the acquisition and production of ultra-high resolution multibeam echo sounder (MBES) data for seabed mapping and nautical charting applications.

Data are acquired on board a dedicated in-house survey vessel (12-hr and 24-hr capability) mobilised with the latest generation shallow water multibeam echo sounder.

The Kongsberg EM2040 Compact shallow water multibeam (dual head, dual swath configuration), provides 1600 soundings per ping, making it ideally suited for the object detection requirements of nautical charting surveys. The dual swath capability allows for increased data density along-track, reducing the survey duration and making the system a more cost-effective option for our clients. A-2-Sea offers alternative MBES systems such as the R2Sonic 2024 and Reson SeaBat 7125 (both provide a 0.5° x 1° beam width at 400KHz).

A-2-Sea’s survey professionals are highly skilled FIG/IHO/ICA Category A accredited surveyors and offer over 10 years of nautical charting experience for UK based charting agencies. All surveyors are practised with the United Kingdom Civil Hydrography Programmes’ survey specification A and B. To discuss project requirements or for information on survey vessels, please call us on 01794 830909 or email us.

Tailored Survey Services:

  • Acquisition and processing of ultra-high resolution multibeam bathymetry, backscatter and water column data for nautical charting and wreck investigation surveys.
  • Kongsberg multibeam echo sounders (dual head configuration) with dual ping and dual swath capability reducing the survey duration and operational cost.
  • Seabed sampling, conducted on a 24-hr basis, use to ground-truth multibeam backscatter data and to determine sediment boundaries.
  • Observation of all aids to navigation sailing directions as per the HM Operational Guidance (HMOG’s) standards.

Cost-effective Survey Solution:

  • Rapid mobilisation of dedicated in-house survey vessel with 12-hr and 24-hr operational capability.
  • Dedicated shallow-draft survey vessel ideally suited for inshore survey operations
  • Cost-effective weather standby packages
  • 24-hr data processing facilities
  • Time-efficient delivery of rendered data and survey report

Data Quality:

  • Surveys carried out to meet and exceed Internationally recognised standards (International Hydrographic Organisation S-44 standards)
  • Experience with processing data to the United Kingdom Civil Hydrography Programmes’ survey specification A and B.
  • Practised with the use of relevant related standards, HM Operational Guidance (HMOG’s) NP145, The Mariner’s Handbook (NP100).

Data Processing and Reporting:

  • A-2-Sea’s survey professionals are experienced with processing in CARIS HIPS & SIPS to the UKCHP specification A and B.
  • Dedicated high specification processing machines to deal with large processed datasets.
  • All reporting will be carried out in accordance with the UKCHP specification and all hydrographic forms completed as required.


A-2-Sea featured at numbers 13 and 21 in two recent prestigious Sunday Times Fast Track and Export Track awards. ... Read More

Project: Nautical Charting

A-2-Sea awarded 3 to 5 year contract with the Maritime & Coastguard Agency’s Civil Hydrography Programme. ... Read More

Project: Highlands & Islands

A-2-Sea has installed 40 beach joints as part of the record-breaking operation to bring superfast broadband to the Scottish Highlands. ... Read More

Get in touch

Contact the A-2-Sea team on 01794 830909 or info@a2sea.co.uk