Recently, whilst on a delivery trip, the Almanac was out-dated and had been supplemented with the year’s tide tables from another almanac. This worked fine, except that we had only small scale charts and no up to date pilot book. This meant that the layout of harbours from the old almanac was out of date; and we were missing buoys which should have been there, and were a tad  perplexed when buoys we were expecting to see had disappeared. A trip to the chandler is often necessary so that you have the most up to date information and the largest scale charts available, then your pilotage and navigation can be less problematic!