forestaff
Fore"staff`, n. (Naut.) Defn: An instrument formerly used at sea for taking the altitudes of heavenly bodies, now superseded by the sextant; -- called also cross- staff. Brande & C.
Fore"staff`, n. (Naut.) Defn: An instrument formerly used at sea for taking the altitudes of heavenly bodies, now superseded by the sextant; -- called also cross- staff. Brande & C.