Crossword puzzle clue "sub's navigational aid"

Here are the possible solutions for sub's navigational aid clue

Answer
Clue
Relevancy
sonar
Clue
Sub's navigational aid
canal
Clue
Navigational aid
Definition
to dig an artificial waterway through
chart
Clue
Navigational aid
Definition
to map out
decca
Clue
British radio navigational aid
British navigational aid
echo
Clue
Bat's navigational aid
Definition
a reflected sound
elmap
Clue
Navigational aid to the Chicago train system
gps
Clue
Navigational aid, for short

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