Timothy Dinsdale, ARAeS (1924 – 14 December 1987) was famous as a seeker of the Loch Ness Monster. He attended King’s School, Worcester, served in the Royal Air Force and worked as an aeronautical engineer.
Determined to prove the existence of the Loch Ness Monster, Dinsdale traveled to Loch Ness on an expedition. On the fifth day, 23 April 1960, he videotaped an object he would claim to be the hump of the monster. The grainy film is still believed by some to be proof of the existence of the monster. The Joint Air Reconnaissance Intelligence Centre (JARIC) analyzed it and believed it was an animate object, but later analyses suggest the footage is of a motorboat. Dinsdale dedicated his life to obtaining further evidence, taking part in a total of 56 expeditions, many of them solo. Although he claimed to have later seen the monster's head and neck on two occasions, he failed to obtain any more video footage. He also published several books on the subject.
He is commemorated in the Dinsdale Memorial Award.
- 1961 Tim Dinsdale Loch Ness Monster (Routledge & Kegan Paul)
- 1966 Tim Dinsdale The Leviathans (Routledge & Kegan Paul)
- 1972 Tim Dinsdale Loch Ness Monster, 2nd ed (Routledge & Kegan Paul)
- 1973 Tim Dinsdale The Story of the Loch Ness Monster (Target) ISBN 0-426-10591-5
- 1975 Tim Dinsdale Project Water Horse. The true story of the monster quest at Loch Ness (Routledge & Kegan Paul) ISBN 0-7100-8030-1
- 1976 Tim Dinsdale The Leviathans (revised edition) (Futura) ISBN 0-86007-365-3
- 1977 Tim Dinsdale The facts about Loch Ness and the monster (Johnston & Bacon)
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