A series of daily files of navigation data from the MBARI drifters is available here

Some notes on these files: 

time: noon on Jan 1 = 1.5
ship_lon ship_lat: Decimal ship position
drifter_lon drifter_lat: Decimal drifter position
ship_x ship_y: Position of ship relative to in patch drifter, units are meters

Missing data, such as drifter position and relative ship position when
no drifter was deployed, are denoted NaN.

Use these files at your own risk - they may contain errors. If you find
any, please let me know. If anyone wants different data or different
formats or help merging their data with nav data, please ask.

Pete Strutton (stpe@mbari.org)