Sheet 86D/13/NW Buchanan Island HIND 1023 Second Edition 1943, reprinted 1943. Second Edition, Jun 1943. Compiled from 1:40,000 air survey Feb 1943, and half-inch (1:126,720) published sheet 1887. HIND 1023. Published SGI. Reg.No.721 X.D.D'43–X'43. Printed SIO. Yard Grid IVB.