Boom 03 : (1) A long pole extending upward at an angle from the mast of a derrick to support or guide objects lifted or suspended. (2) A floating barrier used to confine materials upon the surface of the water (e. g. , oil)
NFPA 1405 Guide for Land-Based Fire Fighters Who Respond to Marine Vessel Fires, 2001 ed. http://www.nfpa.org/assets/files/AboutTheCodes/140 5/1405-F2005-ROP.pdf, (Guide: Land-Based Fr Fightr Who Respond to Mrn Vssl - Amer) {396 NFC}