Figure F2. Track chart of the entire single-channel seismic (SCS) survey conducted during Leg 185 (bold line = SCS Lines 1, 2, and 3) and portions of C2005 MCS Lines 39 and 46 east of the Izu-Bonin Trench. Sonobuoy 171 is located on C2005 Line 46, 50 km west of Site 1149. Arrows locate hole positions for Site 1149 and proposed Site BON 10. Bathymetry is in meters below sea level from Smith and Sandwell (1997); GMT software, Wessel and Smith (1995).