Adrian Shine speculated, from the size, that some of the contacts might be seals that had entered the loch. The sonar expert Darrell Lowrance, whose company donated units, examined a return showing a large moving object at 180 metres near Urquhart Bay. He said there was something he did not understand, larger than a fish, perhaps a species not yet detected.
The operation is the best known mass sonar sweep of the loch and is still cited by both believers and sceptics. A tree stump resembling the earlier gargoyle head was also filmed during it.
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