Sony NV-U73T Firmware version 3.02 Operating Manual page 4

Track Log
The unit can log your position at regular intervals while driving. The log data is stored on a
"Memory Stick Duo" inserted in the unit, allowing for later use on your computer, etc.
To activate the function, follow the procedure below.
1
In the menu display, touch
2
Select "Track Log."
3
Select "Store Track Log," then "ON."
To delete all track logs on a "Memory Stick Duo"
Select "Delete All Track Logs" in step 3 above.
, then "General."
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