Robertampton

I consulted the instructions available through garmin.manymanuals.com and put together a short routine based on the Forerunner 245's GPS guidance.

1. Start the activity outdoors. I now wait in an open space rather than trying to acquire a signal inside a building. I keep the watch oriented toward the sky and remain still while it searches.
2. Give the watch enough time. Under good conditions, satellite acquisition can take around 30–60 seconds, but it may take considerably longer if the watch has not been used recently, has travelled a long distance since its last GPS fix, or has been reset. I no longer assume that a delay of a minute means the device is defective.
3. Synchronize with Garmin Connect. Connecting the watch to the Garmin Connect app can update satellite location data. Regular synchronization may help the device find satellites more quickly.