Important Information Please Read First All sighting and photographic references
on this page are documented and can be verified through various publications.
Index of Reported Sonar Contacts
Date: 1954 Investigators: Captain Donald
MacLean & Mate Peter Anderson Type of Equipment: Messrs. Kelvin & Hughes, Marine Echo Sounder Type
of Experiment: Peterhead drifter Rival III; ordinary depth sounding Significant Results: Inconclusive
Date: 1960 to 1972 Investigators: Miscellaneous
vessels passing through Loch Ness Type of Equipment: Depth recorders of various manufacturers Type
of Experiment: Ordinary depth sounding Significant Results: Inconclusive
Date: 1960 June to July Investigators: Dr Peter F
Baker & Mark Westwood Type of Equipment: Basdic Frequency 38kHz Type of Experiment:
Preliminary survey Significant Results: None
Date: 1961 Investigators: Birmingham University
Loch Ness Expedition Type of Equipment: No Information Type of Experiment: Vertical echo sounding
from surface Significant Results: None
Date: 1962 July to August Investigators: Oxford
and Cambridge Loch Ness Expedition, Dr Peter F Baker and team Type of Equipment: Three Basdic Units
(Simrad of Oslo, Norway) Frequency 28kHz Type of Experiment: A. Single moving craft traverse B.
Shore-based sonar gate C. Moving sonar curtain Significant Results: Inconclusive (possibly none)
Date: 1968 April Investigators: Birmingham
University, Prof D Gordon Tucker, Dr Hugh Braithwaite, Dr D J Creasy and team Type of Equipment:
Digital Sonar developed by Birmingham University. Frequency 50kHz Type of Experiment: Fixed sonar
screen, shore-based Significant Results: Positive
Date: 1968 August Investigators: Same Birmingham
Team Type of Equipment: Digital Sonar developed by Birmingham University. Frequency 50kHz Type of
Experiment: Fixed sonar screen, shore-based Significant Results: Positive
Date: 1969 Investigators: Same Birmingham Team,
except cooperation with Plessey Ltd. team Type of Equipment: Digital Sonar developed by Birmingham
University. Frequency 50kHz Type of Experiment: Fixed sonar, shore-based Significant Results:
None
Date:1969 June to August Investigators: Vickers,
Ltd., R W Eastaugh and team Type of Equipment: Western Marine Electronics SS100; Frequency 155kHz Type
of Experiment: Mobile mode, sonar aboard Pisces submarine Significant Results: Positive
Date: 1969 May Investigators: LNIB Ltd., Major
Eustace Maxwell, David James, Lord Richard Percy, Dr Ian Lyster Type of Equipment: Marconi Depth
Sounder Raytheon Model 729 Fathometer; Seascribe Depth Finder Type of Experiment: Drifter Penorva
mobile mode from surface craft Significant Results: None
Date: 1969 September Investigators: Independant
Television (ITN) sponsorship. Plessey Ltd. (in cooperation with Birmingham Tucker Team) Type of
Equipment: Plessey Model 195; Frequency 10kHz Type of Experiment: Stationary vessel in middle of
Loch; 5 kilowatts of audible sonic energy projected Significant Results: None
Date: 1969 September to October Investigators:
World Book Encyclopaedia Griffis Foundation, LNIB Ltd., Robert Love & team, Captain Don Boddington Type
of Equipment: Honeywell Scanar II; Frequency 100kHz Type of Experiment: Mobile search mode made from
surface vessel Rangitea Significant Results: Positive
Date: 1970 September Investigators: Birmingham
University Prof D Gordon Tucker, Dr Hugh Braithwaite, Dr D J Creasy and team Type of Equipment:
Digital Sonar developed by Birmingham University; Frequency 50kHz Type of Experiment: Fixed sonar
screen, shore-based Significant Results: Positive results not published
Date: 1970 August to November Investigators: World
Book Encyclopaedia, Carl Byoir and Associates, LNIB Ltd., Robert Love and team, Captain James Skinner Type
of Equipment: Honeywell II; Frequency 100kHz Type of Experiment: Mobile search mode made from
surface vessel Rangitea Significant Results: Positive
Date: 1970 September Investigators: Academy of
Applied Science, Robert Rines, Martin Klein and team Type of Equipment: Klein Associates Model MK -
300 Side Scan; Frequency 50kHz Type of Experiment:A. Fixed mode from shore-base B. Towed mode from
surface craft Significant Results: Both Positive
Date: 1972 August Investigators: Academy of
Applied Science, Robert Rines and Team Type of Equipment: Raytheon Depth Finder Model DE - 725C;
Frequency 200kHz Type of Experiment: Fixed surface operation Significant Results: Positive
Legend of Nessie - Ultimate and Official Loch Ness Monster Site - The Evidence
