PLATE XXIX 



Fig. I. Extremely irregular bottom recorded when approaching Bouvet 

 Island from the south-west. Speed of ship, lo knots. Vertical scale, 

 X 10-8. From 54° 33-4' S, 02° 50-3' E to 54° 27-1' S, 03° 04' E. 

 (Part of Record XX\738.) See Text-fig. 2 (a), p. 45. 



This is a typical example of the difficulties met in obtaining echo 

 soundings from moderate depths on the line between the latitude 

 of 40° S and the ice-edge, on the meridian of Greenwich. On this 

 occasion conditions were good since the sea was calm, wind only 

 force 2 and there was little swell. 



Fig. a. Irregular bottom at depths varying between 1220 and 1450 fm. 



(2231 and 2652 m.) on the outer slope of the Scotia Arc, 75 miles 



NW X W of Bird Island, South Georgia. Speed of ship, 8 knots. 



Vertical scale, x 8-64. From 53° 59' S, 39° 54' W to 53° 28-3' S, 



40° 00-8' W. (Part of Record IX/34.) See Text-fig. 5(6), p. 49. 

 Fig. 3. Passing Europa Island, Mozambique Channel. Irregular bottom 



and moderate slope. Soundings range between 406 and 1000 fm. 



(742 and 1829 m.). Speed of ship, 8-8 knots. Vertical scale, x 9-5. 



From 22° 247' S, 40° 26-8' E to 22° 18-2' S, 40° 28-8' E. (Part of 



Record XIX/35.) 



