Booms

Masts or yards, lying on board in reserve.
Found on http://en.wikipedia.org/wiki/Glossary_of_nautical_terms

Booms

Masts or yards, lying on board in reserve.
Found on http://en.wikipedia.org/wiki/Glossary_of_nautical_terms

Booms

Masts or yards, lying on board in reserve.
Found on http://www.translationdirectory.com/glossaries/glossary101.htm

booms

spars extending from the masts to hold the bottoms of the sails outstretched.
Found on https://www.cliffsnotes.com/literature/t/treasure-island/study-help/full-gl

Booms

Usually Tail Booms, a longitudinal structure which is used on some aeroplanes in place of the fuselage to carry the tail unit.
Found on http://www.aeroplanemonthly.com/glossary/
No exact match found