Issue Date: Friday 6 May 2005
The Commissioners of Irish Lights hereby give notice that on or about 1 June 2005 the General Lighthouse Authorities will commence trial transmissions of Loran C in the frequency band 90-110 kHz from a location in Rugby in approximate position Latitude 52° 22'.009 N, Longitude 01° 11'.294 W. It is anticipated that the signals will have an effective usable range of up to 1,000 nautical miles.
The signals will be pulsed, with a Group Repetition Interval of 6731 (67,310 microseconds) and an Emission Delay of 27,300 microseconds. Initially, transmissions will carry a blink pattern, which may prevent their use by receivers; on completion of signal testing a further Notice to Mariners will be issued and the 'blink' feature disabled.
Mariners are advised that: