Tidal Hours is an essential app for any marine navigator and really useful for anyone undertaking the RYA Day Skipper or Coastal Skipper qualifications. Use it to quickly fill out the times on your tidal streams atlas before you set out for the day.

When working out an estimated position or trying to calculate a course to steer a navigator needs to calculate the correct Tidal Hour to use.

A Tidal Hour covers half an hour before to half an hour after the tabulated time.

Some people have difficulty in calculating the correct times for Tidal Hours which can lead to mistakes in passage planning.

The Tidal Hours app has been designed to make the process of calculating Tidal Hours as simple as possible, just select the correct time for High Water, which can be found in your Tidal Atlas and calculate your Tidal Hours table.