Guidance

MGN 719 (M+F) Operating in GNSS denied and degraded environments

Guidance on the risks of GNSS degradation and denial, and measures maritime stakeholders can take to improve resilience and operational safety.

• From: Maritime and Coastguard Agency
• Published: 1 October 2026

Documents

MGN 719 (M+f) Operating in GNSS Denied and Degraded Environments

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Notice to all shipowners, operators, masters, officers of the watch, harbour authorities, port operators, VTS providers and maritime stakeholders reliant on PNT services. This MGN provides guidance on risks arising from GNSS degradation and denial and promotes operational resilience measures.

Published 1 October 2026