The last posting dates for Christmas delivery have now passed. This applies to all delivery options - Royal Mail and DPD.

Unfortunately we can no longer guarantee delivery before Christmas.

Our Admiralty print-on-demand facility is now CLOSED for the holidays. All Admiralty chart orders will be sent in the first week of January.
A yellow Portland Speed Time Distance Calculator with scales and measurement markings for navigation and calculations.

Nautical Slide Rules

Browse our collection of slide rules from trusted brands such as Weems & Plath and Blundell Harling. These carefully designed tools make quick work of calculations.

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