There are many old (and maybe more recent) watches that use GPS to track speed, distance, etc. but do not charge any sort of periodic fee for this. Is there any way to locate these using GPS if they are lost?
If not, is there any way to "hack" such a device so that it can be located using GPS if it is lost?
Example of such a watch: https://assets.timex.com/user_guides/W281_M434/W281_GPS_Marathon_QSG_NAEU_hires.pdf