In trials conducted by the General Lighthouse Authorities of UK and Ireland, a 1.5W radio jammer was able to knock out GPS signals over a range of 30 kilometers.
The designs, on show at The Lighthouse, will be considered by a judging panel and the winner announced on 18 January.
In this grab bag of narrative trickery, he tells the penny-dreadful tale of the house painter Guy Maddin (Eric Maahs), who is ordered by his mother to return to the island lighthouse where he grew up and give it two coats of paint.
Opened in 1871, Souter was the first lighthouse in the world designed and built to be powered by electricity, with its foghorn kept in working condition by a dedicated team of local volunteers.
The first lighthouse on the notoriously hazardous Lizard peninsula was built in 1619 by Cornishman Sir John Killigrew, but was eventually demolished.
And even though the beacon was automated years ago, it remains the only lighthouse in Atlantic Canada fully staffed by two lighthouse-keepers: perhaps something more to do with politics than navigation.
The Lizard Lighthouse in Cornwall is to be remotely controlled by a computer at Harwich in Essex.
When Britain's beacons went automatic in 1998, Trinity House Lighthouse Service, the corporation chartered to run lighthouses by Henry VIII in 1514, decided it could make more money by renting out the cottages than by unloading them.
Nearby, across a broad wooden deck that surrounds the cooling water ramp, stands a British Mandate-era lighthouse, erected in 1936, its cement chipped away by the salt air to reveal a crosshatch of bare rebar.
The lighthouse stands on a rugged tall cliff, connected to the mainland by a narrow steel suspension bridge.
However, GPS signals can fail or be fooled by a conflicting radio signal, said Professor David Last, an advisor to the to General Lighthouse Authority.
Lighthouse authority Trinity House plans to switch off Godrevy light on the edge of St Ives Bay by 2010.
BBC: NEWS | UK | England | Cornwall | Lighthouse switch-off considered
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