wrote:

The government is being urged to invest in a radio system developed
during the Second World War, as a back-up to GPS satellite navigation.

Loran is less vulnerable to jamming than GPS and could protect vital
infrastructure after a terror attack, a committee of MPs was told.

More at http://news.bbc.co.uk/1/hi/uk_politics/7459213.stm

For a rather more critical view of this, see The Register:

http://www.theregister.co.uk/2008/06...roll_for_pork/

J