I had a Rand McNally gps that worked great every where in the country but for some reason it would not work in NYC....no idea why. Good luck."
Maybe the tall buildings blocking the view?
I had a similar incident night before last. A visitor from Oregon got lost in the some of the thickest woods of southeast Texas. Called me to come get him out. What, your GPS isn't working? NO and my cell phone is almost dead, and it's getting dark!! Yeah lots of trees out there huh? And they all look alike!
Guns worked...I'll fire a shot. Hear it? Yeah. Walk towards it. I'll shoot again.
I figure I can do that in New York City right?? :)