noun an instrument formerly used at sea for taking the altitudes of heavenly bodies, now superseded by the sextant;
called also cross-staff.
FORESTAFF
Meaning of FORESTAFF in English
Webster English vocab. Английский словарь Webster. 2012
noun an instrument formerly used at sea for taking the altitudes of heavenly bodies, now superseded by the sextant;
called also cross-staff.
Webster English vocab. Английский словарь Webster. 2012