Click [enter data] and enter the time and position of an item drifting in the ocean. iTracker will obtain a BLUElink estimate of the ocean current and compute your choice of either a forward track (ie a prediction of where it will go), or a back-track (an estimate of where it has come from). The track will be shown on a map (along with tracks of surrounding hypothetical items) as well as being output as a kml 'placemark' file (which can be imported to various mapping applications such as Google Earth).

Examples
1) A 25-d long forward track starting at 10S, 140E on 1 Sept, 2007:

2) A 10-d long track starting 3 Feb 2007 at the last known location of a satellite-tracked drifter off Brisbane:

Import this [kml file] into Google Earth and you will see:

at first, showing the starting location of the item as a magenta dot. Operate the time-slider to see the track as a series of positions at 6h intervals.

The motion of the drifter over a 24h period is shown here as magenta arrow heads at 12h intervals, along with the BLUElink velocity field that iTracker uses:

At the time of writing, the track of this drifter is unknown beyond 4 Feb. Its predicted track out to 11 Feb is:

Using iTracker