Notices to Mariners

Notices to Mariners are issued from a number of different sources, such as the UK Hydrographic Office, Trinity House or Local Harbour Authorities.

Safety

Notices to Mariners

Notices to Mariners contain important navigational information. This includes chart updates, changes in buoyage warning of activities such as dredging.

Notices to Mariners are issued by several organisations, including the UK Hydrographic Office (UKHO), Trinity House and local harbour authorities. You can often find Local Notices to Mariners online, and many harbour authorities provide email updates you can subscribe to.

Chart updates and corrections

ADMIRALTY Small Craft Chart Service, a division of the UK Hydrographic Office, provides regular Notices to Mariners for keeping Small Craft Charts up to date. You can find information on the ADIMRALTY Small Craft Charts web page.

Imray has a similar corrections service on its website.

The UK Hydrographic Office (UKHO) publishes radio navigation warnings for NAVAREA 1 and the UK coast on the ADMIRALTY website. Many of these warnings are temporary, but others can remain in force for several weeks. These might then be superseded by Notices to Mariners.

Find Notices to Mariners

Chart publisher and local authority websites for Notices to Mariners:

ADMIRALITY Small Craft Charts	Langstone Harbour Board
Imray	Looe Harbour
Reeds Nautical Almanac	Lowestoft (ABP)
Trinity House	Littehampton Harbour
Northern Lighthouse Board	(Port of) Liverpool
Commissioners of Irish Lights	(Port of) London Authority
UKHO Navigational Warnings	Lowestoft (Broads Authority)
CMAL (West Scotland)	Lymington Harbour Commissioners
Argyll & Bute Council	Manchester Ship Canal
Belfast Harbour	Jersey Harbours
Bembridge Harbour	Medway Ports
(Port of) Blyth	Milford Haven Port Authority
(Port of) Bridgwater	Newhaven Port Authority
Bristol (City Council)	Newlyn Harbour
Bristol Port Company	Orkney Harbours
Brixham Harbour	Padstow Harbour
Broads Authority	Paignton Harbour
Caernarfon Harbour Trust	Plymouth (QHM)
Cardiff Harbour Authority	Poole Harbour Commissioners
Cattewater Harbour	Portland Port
Chichester Harbour	Portsmouth (QHM)
Clydeport	(Port of) Ramsgate
Comhairle nan Eilean Siar	Rye Harbour
Cowes Harbour	St Mary's Harbour
Crouch Harbour Authority	Salcombe Harbour Authority
Dart Harbour	(The Port and Haven of) Sandwich
Dogger Bank	Scarborough Harbour
(Port of) Dover	Scrabster Harbour
Falmouth Harbour Commissioners	Severn VTS (ABP)
Folkestone Harbour	Shoreham Port
Forth Ports	Sullom Voe, Shetland
Fowey Harbour	Southampton VTS (ABP)
Glasson Dock	Southwold Harbour
Gloucester Harbour Trustees	(Port of) Sunderland
Guernsey Harbours	Teignmouth Harbour
(River) Hamble	Torquay Harbour
Harwich Haven Authority	(Port of) Truro
Holyhead Port Authority	Weymouth Harbour
Humber Estuary Services	Whitby Harbour
(Port of) Ipswich	Yarmouth Harbour
Isle of Man