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. Where indicated, the UKHO sounding data are taken from the Admiralty Maritime Data Portal here https://www.admiralty.co.uk/ under the Open Government License.


Cathedral Rock

Ebb Carrs

Cathedral & Ebb Carrs


West Hurkers & Skelly Hole






Greenends & Nestends

Weasel Loch

Prestonhill quarry, Inverkeithing, Fife


Loch Long: A-frames/Finnart, Gortein Point

A-frames / Finnart Gortein Point
(2015) (2017)

Sound of Mull

Wreck Hispania

Wreck Shuna

Wreck Rondo & Am Brican

(2019) (4/5/2008) (2019)

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

Calve Island wall

Auliston wall

north mid south

Glas Eileanan


Loch Sunart

Sligneach Mor

Sligneach Beag

Risga Pinnacle

Broad Rock

Ross rock

(2019) (2019) (2019) (2019) (2019)

Loch Linnhe: Kentallen Wall

(2019) (2019)

Loch Etive: Falls of Lora

(2019) (2019)


Wreck Breda

Madam Alice

(2019) (2019) (6/12/2008) (2019)

Heather Island

Ard Na Cuile

George A West

(2019) (2019) (2019)

Insh Island (to Dubh Sgeir)

(2019) (2019) (2019)

Firth of Lorn

Bogha Ant Sagart

ANZAC Pinnacle

Eilean Creagach

Helena Faulbaums

Bono Rock




Half Moon

Triple reef

Sound of Jura

Dorus Mor

Reisa An T-Sruith

Between Mull and Colonsay

Shackleton Rock

MadMax Pinnacle

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 Long, small wall below pylon


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