Tip: if you are lost In New York City, set off a rocket.
This way people will know where you are and can come to your assistance. If you don’t have a rocket a regular gun can be used. Fire it into the air five or ten times for maximum effect. (or about five seconds of constant burst shooting if all you have is an automatic weapon like an Uzi) I see people wandering around with maps and compasses… all you really need is rocket or a gun.