Sheet 86D/10/SE Flat Island HIND 1023 First Edition 1943, reprinted 1943. First Edition, Aug 1943. Compiled from 1:40,000 air survey Jan 1943, and half-inch (1:126,720) published sheet 1886. HIND 1023. Published SGI. Reg.No.785 X.D.D.'43–X'43. Yard Grid IVB.