Notices to Mariners

GLA Differential Global Positioning System (DGPS) Service DGPS Recapitalisation Works

07 - 2009

Issue Date: Friday 24 April 2009

Aid:

Area:

Date: Between the months of July 2009 and April 2010.
The General Lighthouse Authorities (GLA) have commenced preparations for replacement and upgrading of the Differential Global Positioning System (DGPS) equipment for the United Kingdom and Ireland. This upgrading will allow differential corrections to be transmitted for future GNSS and additional signals from existing GNSS. There will be no changes to the broadcast parameters (frequency, range etc.). The upgraded service will remain unencrypted and therefore free to users with appropriate receivers.

It is considered appropriate at this time to advise users of the engineering works to upgrade the existing DGPS equipment.
The following DGPS broadcast stations will be upgraded between the months of July 2009 and April 2010.

England & Wales	Scotland	Ireland
Flamborough Pt. Lynas North Foreland St Catherine's Nash Point Lizard Wormleighton	Girdle Ness Stirling Butt of Lewis Sumburgh Head	Tory Island Loop Head Mizen Head

The programme of work has been designed to ensure no disruption of the service to users. Individual stations will be taken off air for periods during this programme. However, adjacent stations will not be off air at the same time, thereby allowing the overlapping coverage of the system to provide continued service within the coverage area.

Broadcast station site specific works will be advised by use of a Radio Navigation Warning at least 48 hours prior to the commencement of works. Notification will also be broadcast by message 16 from adjacent DGPS stations.

By Order, S. G. R. Ruttle, Chief Executive.