Chart of the North Sea comprising all the modern surveys, drawn by J.S. Hobbs, FRGS, hydrographer

Scale: circa 1:2,000,000 (lat). Blue-backed chart with four insets and eleven views Insets: 1. Bergen &c circa 1:350,000 (bar); 2. Shields Bar &c circa 1:19,000 (Bar); 3. Entrance to the River Tay and Dundee circa 1:90,000 (bar); 4. Aberdeen circa 1:60,000