self propelled trolley with v frame 120 tons TAILOR-MADE MARINE CRANES 120 tons x 10.5 m 0.25–5 m/min 60 tons x 22 m 0.5–10 m/min hook of 150 tons; and a trolley with a 20-ton hook that travels along almost the entire length self-propelled crane vessel and is equipped with two 600-ton main hooks which can be operated separately, a 300-ton auxiliary hook, tugger ...