(-men, -me): Særlig kraftig bom, der bruges til lastning og losning af vægte, der overstiger de 5 til 10 tons, som skibets almindelige bomme kan håndtere. heavy lift derrick. [ABC, LAB p.120, SKT81 p.264 + 363] heavy lift boom - or Jumbo boom capable of handling lifts up to 50 tons. It is stepped in a strong casting or step of fabricated steel riveted or bolted to the deck as close as possible to the mast. [SOT p.38] Kilder