Total Tide is the world's most comprehensive prediction program providing fast accurate tidal height and tidal stream predictions.

Use this option to add additional areas to your current licence.  You will need your current ADP liceince number, this is in the form of a 4 to 8 digit number.   This is not your start up key.
 

Note:
The additional area will be active for the current period of your licence. The cost is discounted based on the duration of licence time remaining

To renew a licence please use the new option on previous page.