10 - 1999
Withdrawal of General Lighthouse Authorities' Decca Navigator
01 December 1999
|Chain 1B-SW British||
South and South East Coasts of Ireland
|Chain 3B-North British||
North and North West Coasts of Ireland
The Irish Chain 7D, which is operated by an Bord Iascaigh Mhara to provide coverage of the West and South Coasts of Ireland, may continue to broadcast for a further period of time.
Mariners are advised that the sole operation of the 7D Irish Decca Chain will significantly affect the navigational coverage of the Irish Coast as previously provided. The current enhancement of cross chain fixing will be permanently removed. Thus, areas which are on the periphery of the 7D Chain coverage will experience a significant deterioration of fix reliability and accuracy.
Further details will be issued as a correction to Volume 2 of the Admiralty List of Radio Signals.
By Order, T.M. Boyd, Chief Executive.
Mariners are invited to contact the Marine Department, Commissioners of Irish Lights to comment on any aspect of the Aids to Navigation Service or on hazards to navigation around the coast of Ireland.