Devonport (Plymouth) Tidal Curve - EncapsulatedDevonport (Plymouth) Tidal Curve - A4.Side one shows the curve.Side two has the time and height differences for seconadary ports from St Mary's (Isle of Scilly) to Exmouth.It is encapsulated with a matt finish enabling the use of a 2B pencil. Easier to use than the page from an almanac as the encapsulated curve is far larger and it stays flat. £3.50 (+ postage: £.40)Quantity: 12345678910 Falmouth / Dartmouth Tidal CurveEncapsulated A4 Tidal Curve for Falmouth and Dartmouth.Falmouth one side, Dartmouth the other.Matt encapsulation allows the use of a 2B.Very handy as it stays flat unlike the pages of an almanac. £3.50 (+ postage: £0.40)Quantity: 12345678910 Secondary Port Calculation Sheet Many people struggle to learn Secondary Ports - it is one of the main problem areas on RYA courses.This A4 encapsulated sheet will make life so much easier.Side one shows an example of Time Differences and side two has an example of Height Differences.Both sides have sufficient space for your own calculations.Matt encapasulation means that a 2B pencil may be used directly on the plastic. £3.50 (+ postage: £0.40)Quantity: 12345678910