Dive Site Chartlets and Echo Soundings

Edinburgh University Sub-Aqua Club

This page is a permanent "work-in-progress". As I get new data, the charts will be updated.

Hand-drawn maps and charts done by collecting data from many dives with me taking notes and pictures underwater while my buddy drags around an SMB with a GPS.

St.Abbs: Cathedal Rock & Green Carrs, Ebb Carrs, Petticowick

Cathedral RockEbb CarrsPetticowick

Dunbar: Yetts, Gripes, Bathe

Yetts Gripes Bathe

Eyemouth: Greenends Gully & Nestends, Weasel Loch

Greenends Weasel Loch

Prestonhill quarry, Inverkeithing, Fife

Hand-drawn map/chart done by collecting data from dives and from soundings from the surface.

Sound of Jura: Dorus Mor, Reisa An T-Sruith

Dorus Mor Sruith

Between Mull and Colonsay: Shackleton Rock, Pinnacle

Shackleton Rock MadMax Pinnacle

Works in Progress: West Hurkers, A-frames/Finnart, Gortein Point

West Hurkers / Skelly HoleA-frames / Finnart Gortein Point

Works in Progress: Firth of Lorn

Bogha Ant SagartANZAC PinnacleEilean Creagach

Below are 4 types of plots:
(1) Coverage (on the left in a series of three, looks 'blotchy'). Each sounding produces a circle indicating the area covered by the 10 degree cone on the sea bed. Lighter gray shades are shallower.
(2) Interpolated gray-scale (middle in a series of three, looks smooth). Triangular Voronoi tesselation of sounded points, then interpolation within triangles. Lighter gray shades indicate shallower depths.
(3) Contour plots (right in a series of three). Triangular Voronoi tesselation of sounded points, then interpolation within triangles. Contours are annotated with depths. Outline of a boat indicates our guess of the position of the wreck. The size of the outline is what the ship was when she was sailing. Bold "*" usually indicate the charted position. Small "+" symbols indicate depth sounding positions. The two bars (one horizontal one vertical) are 20m length. The coordinates are in degrees and decimals (GPS position WGS84 datum), except where indicated otherwise. Depths are in m, ref LAT.
(4) Previous soundings. Plots done on previous occasions, with soundings recorded manually. The style varies, so read legend carefully.

Firth of Clyde

Wreck Wallachia

previous sounding (8/1/2006)

Wreck Akka

previous sounding (4/12/2005)

Wreck Greenock

previous sounding (18/12/2005)

Wreck Beagle


Wreck Kintyre

(20/10/2007,29/11/2009) (27/2/2016)

Wreck Champion


Clashfarland Point



Loch Fyne, Argyll Caravan Park

(11/11/2007, 18/11/2007)

Loch Fyne, St.Cathrines, Seal Reef


Loch Linnhe, Kentallen

(24/5/2015) (24/5/2015)

Falls of Lora, Loch Etive


Loch Long, small wall below pylon


Sound of Mull

Wreck Shuna


Wrecks Swan, Hispania, Thesis, Rondo, Shuna, Buitenzorg, Pelican, Evelyn Rose, Logan, Macduff:

Excellent report by Philip Robertson from Historic Scotland: Sound of Mull Remote Sensing Project (June 2004)

This was the state of tide when I dived the Hispania, Thesis, Rondo and Shuna.


Wreck Breda


Isle of Skye

Loch Bay Pinnacle


SW Isay Island, Loch Dunvegan


SW Wiay Island, Loch Bracadale


Cape Wrath, Ardnamurchan, Dunnet and Duncansby Head

The Cape Wrath Report describes dive sites sounded during a EUSAC expedition in September 2008.
The Ardnamurchan Report describes several dive sites sounded during a EUSAC expedition in September 2009.
The Dunnet and Duncansby Head Report describes several dive sites sounded during a EUSAC expedition in July 2010.

East Coast south of Firth of Forth

Wreck Somali, Farne Islands


Wreck Glanmire, St. Abbs Head

(23/5/2010) (6/6/2010)

Relative Ship Sizes

The data shown here should only be understood as exercise in depth sounding / charting / bathymetry and should not be relied upon for activities where safety is critical.

Equipment: Garmin GPSMAP 178C, dual frequency transducer (50/200 KHz), 12V 12Ah lead-acid battery, in Explorer cases 1913 and 4419. This equipment was funded by the University of Edinburgh Development Trust.

Comments welcome to m.ruffert (at) gmx.net