html geo location not working across all browsers

html geo location not working across all browsers

I'm using the html5 JS function navigator.geolocation
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(geoLocationSuccess,
geoLocationError);
}
When I run the function on windows 7 in chrome, ff, ie10, it returns
almost instantly with my location.
Now I'm testing on a new ipad with mobile safari. The iPad initially
prompts if I want to allow the browser to use my location. I click yes.
After about a minute the geolocationError function is called with error
code 2 (location is unavailable).
Both devices are on the same wifi network and one can find the location
and the other can't.
I've read mobile safari supports the geolocation function. Am I doing
something wrong?