Plans included:Pierowall Harbour (1:40 000)Whitehall Harbour (1:25 000)Bay of Kirkwall (1:12 500)Stromness Harbour (1:12 500)Scrabster Harbour (1:7500)Wick Bay (1:10 000)On this edition the latest depths have been applied where available. The chart specification has been improved to show coloured light flashes. There has been general updating throughout.