Crossword puzzle clue "gps ancestor"

Here are the possible solutions for gps ancestor clue

Answer
Clue
Relevancy
loran
Clue
Nautical ancestor of GPS
Definition
an acronym for long-range radio navigation system
roadmap
Clue
GPS ancestor
sextant
Clue
GPS ancestor
abacus
Clue
Ancestor of the adding machine
Computer ancestor
Calculator's ancestor
Ancestor of a calculator
Definition
(Latin) a counting frame using beads
adam
Clue
Everyone's ancestor

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