Answer:

loran

AnswerCrossword Clue
LORANShipboard navigation system
LORANNavigational aid
LORANNavigation system
LORANLong-range navigational system
LORANGPS alternative
LORANGPS predecessor
LORANSearching system
LORANShip-finding acronym
LORANPositioning system
LORANShip-locating system
LORANGPS precursor
LORANRadio-based navigation system
LORANNavigation acronym
LORANShip's guidance system
LORANGPS forerunner
LORANGPS precursor for ships and planes
LORANShip finder
LORANSiting system
LORANCraft-locating system
LORANNavigation aid
LORANShip's navigational aid
LORANSystem of Long-Range-Aid-to-Navigator: U. S. Navy.
LORANAid to air navigation.
LORANAir navigation aid.
LORANLong-range navigation radar.
LORANRadar for navigation.
LORANLong range navigation.
LORANAid to transoceanic pilots.
LORANSignal system.
LORANModern navigation aid.
LORANNavigator's aid.
LORANAid to navigators.
LORANLong-range navigating system.
LORANNavigation aid.
LORANElectronic system of navigation.
LORANAirship navigation system.
LORANDevice used in navigation.
LORANNavigator's device.
LORANShort for "long range navigation."
LORANNaval navigation system.