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Rivers and Moorings

Notices to Mariners

Notices to mariners are issued for information purposes to aid safe navigation.

Active notices:

19 September 2026: Bradwell-on-Sea Flying Display Safety Zone

Mariners are advised that the annual Bradwell-on-Sea air show is due to be held on 19 of September 2026. The display will be held in the skies above the River Blackwater adjacent to Bradwell from 12:30pm to 15:30pm.

Times may vary due to weather conditions.

An area of the River Blackwater has been designated as a flight path safety zone between the following co-ordinates, and all river users are politely asked to remain outside of this for the duration of the display.

  • N - 51˚44.39N 0˚52.47E
  • E - 51˚44.27N 0˚53.23E
  • S - 51˚43.45N 0˚52.42E
  • W - 51˚44.00N 0˚52.12E

Note: The safety area between coordinates ‘E’ and ‘S’ follows the coastline.

For further flight information please email Roger@r5airdisplays.co.uk or call 07950 967282.

Should you require any further information regarding these marks, please email river.bailiff@maldon.gov.uk.

Click here to d​​​​​ownload a copy of the notice with further details.


6 July 2026: Maldon Harbour Dredging Work

Mariners are advised that dredgers will be operating in Maldon Harbour during high tides on multiple dates and at various locations from 1 July 2026 to 1 April 2027.

The dredging vessels will be constrained in their manoeuvrability and draught, and will frequently be stationary. They should be given a wide berth.

The dredgers will be contactable in emergencies on VHF Channel 16.

Notice issued for and on behalf of Maldon Harbour Improvement Commissioners.

Click here to d​​​​​ownload a copy of the notice with further details.