Apps for Android phone and tablet

On your Android phone or tablet this app calculates the course to steer and the optimised departure time from its built in tidal database, so you do not need to go online. Calculations are not time limited, and you can passage plan and predict tides for now or for many years ahead.

Route animations let you virtually sail your course to see the effect of wind over tide on your intended route, and after a calculation you can share your plan for SOLAS compliance. Charts are raster charts derived from UKHO data, or simple outline charts, and the latest chart can always be fetched by an in app download.

When you install the app you get a five day evaluation period, which includes some sample data from the English Channel. Neptune is primarily concerned with tidal passage planning in and around the UK and adjacent waters.

The app itself is free. The charts and the associated tidal information need a yearly subscription, out of which Neptune pays the royalties to the issuing authorities.

This app contains the details and location of thousands of wrecks around the UK and the adjacent continental coastline. Search or select a wreck and the details come from its internal database, so you can use it at sea without an internet connection.

For the diver and the fisherman it produces reports of slack and flood water times, which makes it very useful for planning dive times and producing a SOLAS type passage plan. It plots depths, cargo, conditions and year of loss, and with the device's internal GPS you can navigate to a location.

Its inbuilt tidal height and tidal stream calculations predict tidal height and tidal stream details around the UK coastline for many years into the future.