Haven we already got an alternative system i.e. The Decca Navigation System?
Decca has been discontinued in the UK and Ireland. There are four Decca masts in the Republic of Ireland. There are 24 masts in Britain and Ireland at average height of 300 ft. However, Decca suffers in range, accuracy, night effect and cost compared to Loran-C. There is poor coverage on the South Coast of Ireland with errors rated in miles. Decca requires many more masts than a Loran-C system. One Loran-C mast will suffice for total U.K. and Ireland coverage. The Decca service in the UK ceased operation from 31st March 2000. The Irish Decca stations ceased operation on May 19th 2000.
