# Shine n.d.: Operation Deepscan > Adrian Shine, n.d.. 18 records on Mysteries Department cite it. The primary account of the largest sonar sweep and of the fish-stock estimate. Source: https://mysteriesdept.com/sources/SRC0CRFX1HE49S7/operation-deepscan Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) --- [Sources](https://mysteriesdept.com/sources)[Loch Ness](https://mysteriesdept.com/mysteries/loch-ness)Shine n.d. **0** # Operation Deepscan Adrian Shine, n.d.. _Loch Ness Project (lochnessproject.org), Fieldwork and Groundtruth_. The organiser's account of Operation Deepscan (1987): twenty boats with echo sounders swept the loch in line; most contacts proved fixed, but three, stronger than fish echoes and deeper, had gone when revisited and remain unexplained. Also reports that seals visit the loch almost every year, that the deep water column is barren, and that the Simrad-supported Operation Echo (1987–1991) made the first quantitative acoustic estimate of the open-water fish population, about 20 tonnes. **Loch Ness** Web pageCopy of **[Operation Deepscan sonar records (1987)](https://mysteriesdept.com/mysteries/loch-ness/artifacts/ART0CRFXPHA3567/operation-deepscan-sonar-records-1987)** Checked against the original0 ## What it's used for here The primary account of the largest sonar sweep and of the fish-stock estimate. ## Cited by on this site 18 records [Acoustic artefacts or transient objects (fish schools, thermocline returns, side lobes, debris).](https://mysteriesdept.com/mysteries/loch-ness/answers/ANS0CRFXJ4P341Q/acoustic-artefacts-or-transient-objects-fish-schools) Answer ANS [Seals that have entered the loch from the sea.](https://mysteriesdept.com/mysteries/loch-ness/answers/ANS0CRFXHD82F8Z/seals-that-have-entered-the-loch-from-the-sea) Answer ANS [Operation Deepscan sonar records (1987)](https://mysteriesdept.com/mysteries/loch-ness/artifacts/ART0CRFXPHA3567/operation-deepscan-sonar-records-1987) ART [Operation Deepscan sonar records (1987): document](https://mysteriesdept.com/mysteries/loch-ness/copies/CPY0CRFXPS456HP/operation-deepscan-sonar-records-1987-document) CPY [A few deep sonar contacts from Operation Deepscan remain unexplained.](https://mysteriesdept.com/mysteries/loch-ness/evidence/EVD0CRFXC1C3TRP/a-few-deep-sonar-contacts-from-operation-deepscan-remain) Evidence EVD [Acoustic surveys put the open-water fish stock at about 20 tonnes.](https://mysteriesdept.com/mysteries/loch-ness/evidence/EVD0CRFXBHR4SPP/acoustic-surveys-put-the-open-water-fish-stock-at-about-20) Evidence EVD [Deepscan contacts were not 10-metre animals; they were stronger than fish and transient.](https://mysteriesdept.com/mysteries/loch-ness/evidence/EVD0CRFXJW45QPX/deepscan-contacts-were-not-10-metre-animals-they-were) Evidence EVD [Most sonar expeditions have reported echoes they did not understand.](https://mysteriesdept.com/mysteries/loch-ness/evidence/EVD0CRFXJCG55JJ/most-sonar-expeditions-have-reported-echoes-they-did-not) Evidence EVD [Seals are known to visit the loch almost every year.](https://mysteriesdept.com/mysteries/loch-ness/evidence/EVD0CRFXHN20CPM/seals-are-known-to-visit-the-loch-almost-every-year) Evidence EVD [Seals enter the loch almost every year and may explain strong sonar contacts.](https://mysteriesdept.com/mysteries/loch-ness/evidence/EVD0CRFXBSJ4MD6/seals-enter-the-loch-almost-every-year-and-may-explain) Evidence EVD [The deep water column has no food, so it is not a seal's normal habitat.](https://mysteriesdept.com/mysteries/loch-ness/evidence/EVD0CRFXHWW0SAE/the-deep-water-column-has-no-food-so-it-is-not-a-seals) Evidence EVD [Operation Deepscan sweeps the loch with twenty sonar boats](https://mysteriesdept.com/mysteries/loch-ness/events/EVT0CRFX84C224X/operation-deepscan-sweeps-the-loch-with-twenty-sonar-boats) EVT [Operation Echo estimates the open-water fish stock at about 20 tonnes](https://mysteriesdept.com/mysteries/loch-ness/events/EVT0CRFX8C61517/operation-echo-estimates-the-open-water-fish-stock-at-about) EVT [Adrian Shine](https://mysteriesdept.com/mysteries/loch-ness/people/FIG0CRFX65W526Q/adrian-shine) FIG [Loch Ness](https://mysteriesdept.com/mysteries/loch-ness) The mystery article MYS [Loch Ness Project](https://mysteriesdept.com/mysteries/loch-ness/organisations/ORG0CRFX6XA7RS4/loch-ness-project) ORG [Does Loch Ness hold a large animal unknown to science?](https://mysteriesdept.com/mysteries/loch-ness/questions/QST0CRFXA2W308J/does-loch-ness-hold-a-large-animal-unknown-to-science) Question QST [What were the unexplained deep sonar contacts?](https://mysteriesdept.com/mysteries/loch-ness/questions/QST0CRFXATA5QK8/what-were-the-unexplained-deep-sonar-contacts) Question QST ## Cite it ``` Shine, A. (n.d.). Operation Deepscan. Loch Ness Project (lochnessproject.org), Fieldwork and Groundtruth. http://www.lochnessproject.org/FIELDWORKGROUNDTRUTH/DEEPSCAN%20OP/DEEPSCAN%20OPERATION%20LOCH%20NESS.html ``` [Read it free at lochnessproject.org](http://www.lochnessproject.org/FIELDWORKGROUNDTRUTH/DEEPSCAN%20OP/DEEPSCAN%20OPERATION%20LOCH%20NESS.html) Key **SRC** 0CRFX1HE49S7 Kind Web page Rights The publisher's Kept 27 Oct 2026, for editors Checked Against the published original Added by [apollo](https://mysteriesdept.com/u/apollo) The record Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS. [CSL-JSON](https://mysteriesdept.com/sources/SRC0CRFX1HE49S7/operation-deepscan/csl.json)