Bangle.js time steadiness

Turning it on for literally just 1 second (to get the time off it) and then turning it off once an hour won't hurt battery life noticeably - it wouldn't be getting new time from satellites, just telling you what time was in the GPS RTC.

Why is this true? If you turn it on, it doesn't get fix, the callback isn't GPSfix related? What triggers the callback, if its not a fix from satellite?
Edit: Just read something about once a second, so I guess its just spewing same data since last fix every 1 second???