Long time in config.cfg navigation_announcements_times not working
I would like an advance announcement of upcoming navigation waypoints. The defaults are for 15 seconds, 35 seconds and 5 minutes in advance as per config.cfg setting navigation_announcements_times=15|35|300.
I have changed 300 to 600 i.e. my navigation_announcements_times=20|180|600.
Now the announcements are 10 minutes, 3 minutes and 20 seconds before the upcoming waypoint. However I never get the 10 minute notification. The other two announcements work fine. Is there a maximum value for this third parameter? What I really wanted is a hands-free notification just after the last turn has been completed of the next waypoint similar to any car GPS unit, and a notification half way between waypoints although this is not currently possible. Worth a separate topic?