Answer: SEXTANTS

AnswerCrossword Clue
SEXTANTSNavigating tools
SEXTANTSNavigational tools that measure the positions of celestial bodies
SEXTANTSNavigators' instruments.
SEXTANTSQuadrant's relatives
SEXTANTSNavigation aids
SEXTANTSAstronomical instruments
SEXTANTSShips' instruments
SEXTANTSAstronomers' instruments
SEXTANTSNavigation tools
sextantsan instrument for measuring angular distances used especially in navigation to observe altitudes of celestial bodies (as in ascertaining latitude and longitude)
sextantsSEXTANT, an instrument for measuring angular distances