The report of this survey, which was instrumental in getting the SAC designated, defines the firth as follows. The “Inner Firth of Lorn” is the waters directly south of the peninsula between Loch Buie and Loch Spelve on Mull and east of the peninsulas between Loch Spelve and Duart Bay. The waters around the islands on the east side of the firth are included, being in the current SAC, even though they may have their own names. The “Outer Firth of Lorn” is the waters south of the Ross of Mull as far as the west coast of the Isle of Jura. There is no indication that the Sound of Jura is to be considered in the firth, even though its northern portion was in the study area.