GNSS resilience at sea and in port

Vessels, port equipment and survey craft depend on GNSS for position and time. We help find the gaps and plan for when it drops out, or lies.

WHO
Operators, ports, survey
TYPICAL WORK
Reviews, audits, testing
START WITH
A resilience review
Talk about your operationDownload a sample report
Chart of an estuary with sandbanks, small islands and a narrow channel, showing a small craft following the channel, with a tide curve marking low water and a one-kilometre scale bar.

WHERE GNSS BITES

Common problems in maritime and ports

SPOOFING

False positions

Spoofed signals can move a vessel’s reported position by kilometres while everything on the bridge looks normal.

TIMING

Port systems on GNSS time

Cranes, gates and terminal systems often take their time from GNSS without anyone having written it down.

SURVEY

Position you can defend

Survey and positioning work needs results that hold up through short outages and can be checked afterwards.

HOW WE HELP

What a project with us covers

  • A map of every system on board or in port that relies on GNSS
  • Checks on how navigation and timing equipment handles jamming and spoofing
  • Backup options for position, heading and time, with honest costs
  • Procedures for crews and operators when GNSS can’t be trusted
  • A written report you can share with your board, insurers and auditors
Two panels comparing a genuine fix, where ranges from four satellites agree on the true position, with a spoofed case in which one transmitter produces ranges that agree on a false reported fix, plus a row of tell-tale signs.
FIG. — A spoofer overpowers the real signals and walks the receiver to a false position. Illustrative.

SAMPLE REPORT

See exactly what you’ll receive

A sample report for each service, written for a fictional system: structure, findings format and recommendations. Illustrative data.

Download sample PDF

FAQ

Common questions

Can you visit vessels and terminals?

Yes. Most review work is remote, but on-site visits can be added to any project.

SERVICES

Where to start

04

PNT resilience review

We map every system that depends on GNSS, including suppliers, and give you a costed roadmap.

From £{x} · about 3 weeks

03

Navigation testing & evaluation

Independent simulation and test campaigns that show how your positioning really holds up.

From £{x} · per campaign

Working at sea or in port?

Tell us about your vessels or site. You’ll get a reply within two working days.

dan@bearingandfix.co.uk