Abstract:
Raw acoustic data recorded by the quantitative echosounder installed on the Umitaka-maru. These were continuously collected between December 31 in 2004 (Leg 1) and January 25 in 2005, and between January 30 and February 20 in 2005. Regarding the cruise track of Leg 1, see the following website (
http://biows.nipr.ac.jp/~plankton/ um0405a.png).