Explore the intricate waterways of Portsmouth Harbor and its approaches with the Admiralty Tidal Stream Atlas> (NP219), 2nd Edition (1991). This essential navigation tool is designed for mariners and enthusiasts alike, providing critical insight into the tidal dynamics of this vibrant coastal region.

Admiralty Tidal Stream Atlases present a comprehensive view of major tidal streams in selected waters of north-western Europe. Each atlas is meticulously crafted to show tidal currents in a diagrammatic format, detailing the direction and rate of the tides at hourly intervals. This is an invaluable resource for anyone serious about navigating these waters.

• Detailed Stream Information: The atlas features graded arrows that illustrate Mean, Neap, and Spring tidal rates, measured in tenths of a knot, ensuring users understand the tide’s behavior throughout the lunar cycle.
• Tidal Stream Calculations: Included is a useful diagram that assists in calculating tidal stream rates for any given date, making planning and navigation more precise.

This atlas is not only practical but also a vital addition for those operating in Portsmouth Harbor. Enhance your navigational skills with accurate tidal data tailored to your needs. Understanding tidal movements is crucial for safe and effective navigation, whether you are a recreational boater, a fishery operator, or involved in marine research.