I picked up a book at a boot fair a whilwe ago called 'The Airmen Who Would Not Die' by John G Fuller, the same guy who wrote 'The Ghost of Flight 401'.
It's all about the ghost of a First World War pilot, one John Hinchcliffe, who disappeared over the stormy Atlantic one dark night in 1928. A few years later, he appeared in a seance to warn the crew of the newly-completed airship R101 not to take off for India because of undiagnosed structural weaknesses.
They delayed the take-off for a while, but then went anyway - and crashed into a hill in France, killing all but six of the fifty-four people on board.
Spooky.