NGA Nautical Chart 936: Plotting Chart 936 Cruising Guides Written by Professor Robert Merkin

Written by Professor Robert Merkin

The definitive guide to fishing and diving the offshore structure of the coast from Hutchinson Island south to Boynton Inlet

Includes complete history and instruction for making 18 historic navigation tools including astrolabe

Helena Sound is a standard navigation chart used by commercial and recreational mariners alike

NGA Nautical Chart 936: Plotting Chart 936 Cruising Guides Written by Professor Robert MerkinNGA Plotting Chart 936 is for use between lattitudes of 74 to 78 (North or South). The chart is 35 inches by 46 inches, and the center lattitude is 76, where a scale of 1: 531,840 makes every 4 inches on the chart equal to one second of longitude.