This is the link to the APRS site giving worldwide information over on active on air APRS stations. You can click on a station and get information about frequencies and modes. Clicking on WX weather stations let you see local weather. Filling in an address, city or locator brings you there. In the box above you can fill in a station’s call sign and so find him.
If you install it in your car the family can see where your are, car’s speed and the direction of driving. Better switch it off if you are going to see a girl friend…