The weather forecast is southerly Force 2 becoming southerly Force 3. It is bright and sunny; local knowledge suggests that the sea breeze will increase this to Force 4 veering to the south-west in the late afternoon.
The nearest high water at Namley to his proposed departure time on 17 August is 0618hrs (UT), corrected to 0718hrs BST, say 0720hrs BST. The most appropriate tidal diamond to use for the tidal stream is ‘B’, as it is located in the area of his passage at the most tidal area, the entrance and exit to Namley Harbour. The corrected time to work out the tidal streams from tidal diamond ‘B’ for Victoria HW is 0606hrs BST (say 0600hrs) and 1850hrs BST.