Answer:

locator

Answer	Crossword Clue
LOCATOR	"You are here" arrow, e.g.
LOCATOR	Radar or sonar, e.g.
LOCATOR	Private eye, at times

LOCATOR	The "L" in URL
LOCATOR	Kind of map
LOCATOR	Google map, say
LOCATOR	Private eye, sometimes
LOCATOR	Find-it feature
LOCATOR	Radar, for example
LOCATOR	Finder of a mining claim.
LOCATOR	Definer of mining-claim limits.

LOCATOR	One who establishes a mining claim.
LOCATOR	Finder.
LOCATOR	Tracer
LOCATOR	Claim finder
LOCATOR	Successful detective
LOCATOR	G.P.S. device, at times
LOCATOR	Global positioning system, e.g.
LOCATOR	G.P.S. device, e.g.

LOCATOR	One finding something
LOCATOR	Mall map
LOCATOR	Store map
LOCATOR	Tracking device