Scale: circa 1:600,000. Chart of the Irish Sea. Lights Coloured. With eight insets. Variation. MS bearings. Additional Places: coordinates given Insets: 1. Lough Foyle 1:120,000 (bar); 2. South Coast of Man 1:80,000; 3. Milford Haven 1:120,000; 4. Belfast Lough 1:40,000; 5. North Rocks etc. 1:120,000 ; 6. Maidens etc. 1:1000,000; 7. Tusker Rock etc. 1:100,000; 8. Skerries Rocks 1:600,000.