GuardianGPS Is Now MED Approved

GuardianGPS, SEALINK’s field-proven anti-jamming and spoofing-resilient marine GNSS system, is now MED approved — a major milestone for Sealink Technology B.V.

Built for the realities of modern navigation, GuardianGPS has demonstrated resilient positioning during severe GNSS interference, with field testing across the Baltic Sea, the Black Sea, the Middle East and the Strait of Hormuz. Field testing recorded 99% position availability under jamming conditions, and more than 100 vessels are already using GuardianGPS.

Tested against IMO and IEC requirements

Behind the approval is a demanding programme of engineering, testing and validation. GuardianGPS has successfully completed testing against the applicable IMO performance requirements and the following IEC standards:

• IEC 61108-1:2003 — GPS
• IEC 61108-2:1998 — GLONASS
• IEC 61108-3:2010 — Galileo
• IEC 61108-5:2020 — BeiDou
• IEC 61108-7:2024 — SBAS
• IEC 61162-1, IEC 61162-2 and IEC 61162-450
• IEC 62288:2022 (+ A1:2024)
• IEC 62923-1:2018 and IEC 62923-2:2018
• IEC 60945:2002

What GuardianGPS brings to the bridge

• Multi-constellation, multi-frequency GNSS reception.
• Intelligent interference detection and signal selection to support positioning continuity.
• Advanced CRPA interference suppression with the Full Protection configuration.
• Clear integrity information and audible/visual alerts for suspected jamming or spoofing.
• Integration with compatible ECDIS, radar, AIS, VDR and other bridge systems.

Every reliable position supports a decision on the bridge, and every improvement in resilience helps crews navigate with greater confidence. SEALINK thanks its R&D and engineering teams, testing partners, customers and the crews whose operational feedback continues to shape its technology.

GuardianGPS. Engineered for interference. Proven at sea. Now MED approved. To discuss the right GuardianGPS configuration for your fleet, contact sales@sealink.co.