NOTICE TO MARINERS

Mariners are advised that the replacement and upgrading of the General Lighthouse Authorities’ DGPS service will now be completed by December 2010, and not by April 2010 as previously advised in NOTICE TO MARINERS NO 17 OF 2009 (DATED 30 APRIL 2009).

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.

The following DGPS broadcast stations will now be upgraded by December 2010: 

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.