Field charts 29-4007 (with omissions). 1029. Blanche Harbor, Treasury Islands, Solomon Islands, south Pacific Ocean, surveys by U. S. S. Pathfinder, Dec. 1943, H. O. chart no. 2901, FMAC Hasty terrain map 1. Scale naut, m.=4.8 in., natural scale 1:15,000. n. p.