World wide set of Harmonic Constants for use with seaPro lite and seaPro products for calculating tidal height curves.

Includes most primary and secondary ports.

Note: This product does not time out, however the data does go out of date with time.

You are recommend to use the Admiralty Total Tides which gives the full set of  harmonic constants and comes with a year of updates (on a 1 year licence). Total Tides meets carriage rerquirements.