Charts
■ Imray – my favourite as their colours are intuitive: green for land, yellow for tidal sand and the darker the blue the deeper the■ C1 Thames Estuary, 1:120,000 (for an overview)■ 2000 series charts portfolio: Suffolk and Essex coasts (this comes in an A2 portfolio with 10 individual charts at 1:35,000 for each river)■ Digital charts