Editon 2 1985. This atlas contains 13 charts showing tidal streams at hourly intervals commencing 6 hours before HW Sheerness and ending 6 hours after HW Sheerness. It also includes 6 charts showing Spring and Neap Range Factors and High and Low Water Time Differences. Covers the Thames Estuary from Ofordness to Southend and Sheerness to North Foreland .