Scale: circa 1:350,000. Chart of the Irish Sea with twelve insets and ten views. Lights coloured. Variation. Blue back. Additional Places: coordinates given Insets: 1. Holyhead Bay 1:60,000; 2. Tuskar Rock 1:100,000 (bar); 3. North Rocks etc. 1:120,000 (bar); 4. Lough Strangford 1:65,000 (bar); 5. Carlingford Lough 1:90,000 (bar); 6. Lough Foyle 1:65,000 (bar); 7. Belfast Lough 1:65,000 (bar); 8. Lundy Island 1:60,000 (bar); 9. Milford Haven 1:60,000 (bar); 10. South coast of Man 1:85,000 (bar); 11. Douglas Bay 1:24,000 (bar); 12. Firth of Clyde 1:100,000 (bar).