Local Notices to Mariners

Local Notices to Mariners (LNtM) are issued by the Port of Mostyn and the Dee Conservancy to provide important information on navigational directions and/or restrictions.

The notices issued by the Port are numbered consecutively with the year it was issued and two digits each for the number of the notice, for example Notice No 2025-01 means Notice No.1 of the year 2025. Notices issued by the Dee Conservancy can be found online at Natural Resources Wales – Dee Conservancy. Please take the time to study these pages as they are in force for the safety of all navigational channel and Port users. A detailed description, date of issue and the status of each notice can be found in the Summary of Notices to Mariners.