In 1960, aeronautical engineer Tim Dinsdale filmed a hump crossing the water in a powerful wake unlike that of a boat. JARIC declared that the object was "probably animate". Others were sceptical, saying that the "hump" cannot be ruled out as being a boat and claimed that when the contrast is turned up too high a man can be clearly seen in a boat.
In 1993 Discovery Communications made a documentary called Loch Ness Discovered that featured a digital enhancement of the Dinsdale film. A computer expert who enhanced the film noticed a shadow in the negative which was not very obvious in the positive.
By enhancing and overlaying frames, he found what appeared to be the rear body, the rear flippers, and 1-2 additional humps of a plesiosaur-like body.
Dinsdale was known as a likeable, reliable steadfast hunter of the Loch Ness monster, not only spearheading his own searches, but helping others who also hunted Nessie. His film is considered undeniable proof that something unknown inhabits the dark, deep waters of the Loch.
Source & References: