4 
BATHYMETRICAL SURVEY OF 
400-feet contour-lines is about 415 acres, or 13 per cent, of the entire 
area of the loch. 
The 200-feet depression is miles in length and half a mile in 
maximum breadth, extending from south of Ellen’s isle to near Black 
island, where it is separated (by a sounding of 198 feet) from a small 
isolated area, lying between Coilachra and Black island, one-third of a 
mile in length by nearly one-eighth of a mile broad. The area between 
the 200- and 300-feet contours is about 510 acres, or 17 per cent, of the 
area of the loch. 
There are two 100-feet depressions, the principal one (6 miles in 
length) stretching from close to Ellen’s isle to Black island, the other 
FIG. 4 . LOCH AEKLET, LOOKING WEST. 
(Photograph by G. W. Wilson.) 
extending from Black island towards the point called Rudha nam 
Moine, with a total length of over half a mile. The area enclosed 
between the 100- and 200-feet contours is about 670 acres, or 22 per 
cent, of the area of the loch. 
The 50-feet line follows pretty closely the contour of the loch, from 
Rudha nam Moine into the eastern arms of the loch at the Trossachs, 
running outside of Black island, Ellen’s isle, and the small islands near 
the shore all round, with a small isolated patch at the junction of the 
Trossachs arm with the arm leading to Achray Water; it encloses a 
small shallow, with a beacon on it, opposite the entrance of the Glasa- 
hoile. The area between the 50- and 100-feet contours is about 400 
