- 1. n. An instrument formerly used at sea for taking the altitudes of heavenly bodies, now superseded by the sextant; -- called also cross-staff. Source: opted
- 2. An instrument formerly used at sea for taking the altitudes of heavenly bodies, now superseded by the sextant; -- called also cross- staff. Brande & C. Source: webster
- 3. An instrument formerly used at sea for taking the altitudes ofheavenly bodies, now superseded by the sextant; -- called also cross-staff. Brande & C. Source: adambom
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forestaff
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