Searches for the monster

The LNPIB sonar study (1967-8)
Professor DG Tucker, chairman of the Department of Electronic and Electrical Engineering at the University of Birmingham, England, volunteered his services as a sonar developer and expert at Loch Ness in 1968. The gesture was part of a larger effort helmed by the Loch Ness Phenomena Investigation Bureau (LNPIB) from 1967-1968 and involved collaboration between volunteers and professionals in various fields. Tucker had chosen Ness as the test site for a prototype sonar transducer with a maximum range of 800 meters. The device was fixed underwater at Temple Pier in Urquhart Bay and directed towards the opposite shore, effectively drawing an acoustic 'net' across the width of Ness through which no moving object could pass undetected. During the two-week trial in August, multiple animate targets six meters (20 ft) in length were identified ascending from and diving to the loch bottom. Analysis of diving profiles ruled out air-breathers because the targets never surfaced or moved shallower than midwater. A brief press release by LNPIB and associates touched on the sonar data and drew to a close the 1968 effort:
“
The answer to the question of whether or not unusual phenomena exist in Loch Ness, Scotland, and if so, what their nature might be, was advanced a step forward during 1968, as a result of sonar experiments conducted by a team of scientists under the direction of D. Gordon Tucker... Professor Tucker reported that his fixed beam sonar made contact with large moving objects sometimes reaching speeds of at least 10 knots. He concluded that the objects are clearly animals and ruled out the possibility that they could be ordinary fish. He stated: "The high rate of ascent and descent makes it seem very unlikely that they could be fish, and fishery biologists we have consulted cannot suggest what fish they might be. It is a temptation to suppose they might be the fabulous Loch Ness monsters, now observed for the first time in their underwater activities!"
”

Andrew Carroll's sonar study (1969)
In 1969 Andrew Carroll, field researcher for the New York Aquarium in New York City, proposed a mobile sonar scan operation at Loch Ness. The project was funded by the Griffis foundation (named for Nixon Griffis, then a director of the aquarium). This was the tail-end (and most successful portion) of the LNPIB's 1969 effort involving submersibles with biopsy harpoons. The trawling scan, in Carroll's research launch Rangitea, took place in October. One sweep of the loch made contact with a strong, animate echo for nearly three minutes just north of Foyers. The identity of the contact remains a mystery. Later analysis determined that the intensity of the returning echo was twice as great as that expected from a 10 foot pilot whale. Calculations placed the contact's length at 20 feet.

Submersible investigations
Earlier submersible work had yielded dismal results. Under the sponsorship of World Book Encyclopedia, pilot Dan Taylor deployed the Viperfish at Loch Ness on 1 June 1969. His dives were plagued by technical problems and produced no new data. The Deep Star III built by General Dynamics and an unnamed two-man submersible built by Westinghouse were slated to sail but never did. It was only when the Pisces arrived at Ness that the LNPIB obtained new data. Owned by Vickers, Ltd., the submersible had been rented out to produce a Sherlock Holmes film featuring a dummy Loch Ness Monster. When the dummy monster broke loose from the Pisces during filming and sank to the bottom of the loch, Vickers executives capitalized on the loss and 'monster fever' by allowing the sub to do a bit of exploring. During one of these excursions, the Pisces picked up a large moving object on sonar 200 feet ahead and 50 feet above the bottom of the loch. Slowly the pilot closed to half that distance but the echo moved rapidly out of sonar range and disappeared.

The Big Expedition of 1970
During the so-called "Big Expedition" of 1970, Roy Mackal, a biologist who taught for 20 years at the University of Chicago, devised a system of hydrophones (underwater microphones) and deployed them at intervals throughout the loch. In early August a hydrophone assembly was lowered into Urquhart Bay and anchored in 700 feet of water. Two hydrophones were secured at depths of 300 and 600 feet. After two nights of recording, the tape (sealed inside a 55 gallon steel drum along with the system's other sensitive components) was retrieved and played before an excited LNPIB. "Bird-like chirps" had been recorded, and the intensity of the chirps on the deep hydrophone suggested they had been produced at greater depth. In October "knocks" and "clicks" were recorded by another hydrophone in Urquhart Bay, indicative of echolocation. These sounds were followed by a "turbulent swishing" suggestive of the tail locomotion of a large aquatic animal. The knocks, clicks and resultant swishing were believed to be the sounds of an animal echolocating prey before moving in for the kill. The noises stopped whenever craft passed along the surface of the loch near the hydrophone -- and resumed once the craft reached a safe distance. In previous experiments, it was observed that call intensities were greatest at depths less than 100 feet. Members of the LNPIB decided to attempt communication with the animals producing the calls by playing back previously recorded calls into the water and listening via hydrophone for results, which varied greatly. At times the calling patterns or intensities changed, but sometimes there was no change at all. Mackal noted that there was no similarity between the recordings and the hundreds of known sounds produced by aquatic animals. "More specifically," he said, "competent authorities state that none of the known forms of life in the loch has the anatomical capabilities of producing such calls."

Robert Rines's studies (1972, 1975 and 2001)

The rhomboid fin photograph, the "flipper" photograph. The image is known to have been retouched from the original. The Museum of Hoaxes shows the original unenhanced photo.
In the early 1970s, a group of people led by Robert Rines obtained some underwater photographs. One was a vague image, perhaps of a rhomboid flipper (though others have dismissed the image as air bubbles or a fish fin). On the basis of this photograph, British naturalist Peter Scott announced in 1975 that the scientific name of the monster would henceforth be Nessiteras rhombopteryx (Greek for "The Ness monster with diamond-shaped fin"). This would enable Nessie to be added to a British register of officially protected wildlife (but compare). Scottish politician Nicholas Fairbairn soon revealed that the name was an anagram for "Monster hoax by Sir Peter S".
The underwater photos were reportedly obtained by painstakingly sonaring the loch depths for unusual underwater activity. A submersible camera with an affixed, high-powered light (necessary for penetrating Loch Ness' notorious murk) was deployed to record images below the surface. Several of the photographs, despite their obviously murky quality, did indeed seem to show an animal resembling a plesiosaur in various positions and lightings. One photograph appeared to show the head, neck and upper torso of a plesiosaur . (Close examination would show a specific head shape and even an eye). Another photo seemed to depict a "gargoyle head", which was later found to be a tree stump during Operation Deepscan.
A few closeups of what is to be the creature's supposed diamond-shaped fin were taken in different positions, as though the creature were moving. But the "flipper photograph" has been highly retouched from the original image. The Museum of Hoaxes shows the original unenhanced photo. Charlie Wyckoff claimed that someone retouched the photo to superimpose the flipper, and that the original enhancement showed a much smaller flipper. No one is exactly sure how the original came to be enhanced in this way.
In 2001, the Academy of Applied Science, known for Robert Rines' photographs, videoed a powerful V-shaped wake traversing the still water on a calm day . Seashells were dated since the Ice Age and proved that the Loch was connected to the sea. Small orange, mushroom-like organisms were also found, never known by science. They also found what looked like a decaying carcass of an animal.

Discovery Loch Ness (1993)
In 1993 Discovery Communications began to research the ecology of the loch. The study did not focus entirely on the monster, but on the loch's nematodes (of which a new species was discovered) and fish. Expecting to find a small fish population, the researchers caught twenty fish in one catch, increasing previous estimates of the loch's fish population about ninefold.
Using sonar, the team encountered a rare kind of underwater disturbance due to stored energy (such as from a wind) causing an imbalance between the loch's warmer and colder layers. While reviewing printouts of the event the next day, they found what appeared to be three sonar contacts, each followed by a powerful wake. These events were later shown on a program called Loch Ness Discovered, in conjunction with analyses and enhancements of the 1960 Dinsdale Film, the Surgeon's Photo, and the Rines Flipper Photo.

GUST Expedition (2001)
A controversial expedition by the Global Underwater Search Team (GUST) was conducted with advanced sonar equipment to search for the creature. One night, a small sonar contact moved on the screen. On another occasion, a vague disturbance was captured on film.
The expedition was shown on a program called Loch Ness Monster: Search for the Truth.

Television investigations (2003-4)
In July 2003, the BBC reported on an extensive investigation of Loch Ness by a BBC team using 600 separate sonar beams to ensure that none of the loch's waters were missed. The expedition found no trace of a "sea monster" or any other large animal in the loch. The BBC team concluded that Nessie simply did not exist.