Hoʻohana ʻia nā pahu pahu pahu pahu Rubber-tire, i kapa ʻia ʻo RTGs no ka pōkole, no ka hoʻopaʻa ʻana i ka pahu ma nā pā ipu. Ua kapa ʻia hoʻi ʻo ka mea hoʻoili ipu, hiki ke hoʻopau ʻia ʻo RTG crane, e hoʻohana ana i nā kaʻa kaila no ka hele ʻana ma nā pā ukana, ʻo ia ka puʻu gantry mobile i hoʻohana mau ʻia e hoʻopaʻa i nā ipu, nā pahu, a me nā wahi ʻē aʻe. ʻO RTG crane ʻo ia ka puʻupaʻa paʻa paʻa paʻa gantry crane, ka mea maʻamau e hoʻohana ʻia e ka ʻōnaehana hana diesel a i ʻole nā mea lako uila ʻē aʻe, a he hopena maikaʻi loa ia no ka mālama ʻana i nā ipu o ka nui haʻahaʻa.
Hāʻawi ka pahu rtg i ka hana nui a me ka hilinaʻi i ka hoʻopaʻa ʻana i nā ipu. ʻAʻole wale ka hele ʻana a puni ka pahu hoʻouka, ʻae ʻia ka pahu rtg no ka hoʻonohonoho hou ʻana i nā mea hana a me ka hana maʻalahi. He ʻāpana koʻikoʻi o nā mea pono no ke awa pahu pahu.
Ua kūpono ka ipu rtg i nā ipu ʻelima a ʻewalu a hāpai i nā kiʻekiʻe mai 3 a i ka 1-1-6 mau pahu. Hiki ke hoʻolako ʻia nā pahu pahu Rubber-tyreged (RTG) ma nā ʻano nui o ka ʻēheu mai ʻelima a ʻewalu pahu ākea (me ka laula o nā ala kaʻa), a me nā kiʻekiʻe hāpai mai ka 1 ma luna o 3 a 1 ma luna o 6 ipu. Ma ke kiʻi ma luna, ʻelua Rubber Tired Overhead Cranes (RTGs) e lawelawe ana i kahi ahu.
ʻO ke kumu o ka pahu gantry crane i kau ʻia ma luna o ke poʻo, ʻo ia ke kau ʻana i nā ipu ma ka laina hoʻopaʻa. Ua kaulana ʻo Automated Rail-mounted Gantry Cranes (ARMGs) mai ko lākou hoʻomaka ʻana ma nā hale kūkulu hou, kahi e pono ai ke kūkulu ʻana i nā ipu e kū pono ana i ka dock, a aia nā wahi hoʻololi ma nā wēlau o nā ʻāpana. Hoʻohana ʻia kahi hoʻolālā kaulana o ka hoʻololi ʻana i ʻelua cranes ARMG like i kēlā me kēia pahu pahu, e holo ana ma ke ala hoʻokahi me kahi wahi hana maʻamau (e nānā i ke kiʻi 1). Ua ulu wikiwiki nā ʻenehana lawelawe ipu hao, me ka manaʻo nui ʻo nā cranes e mālama ana i ka waiho waena o nā ipu i loko o kahi pā.
Ma muli o ko lākou nele i kahi mākia uila no ka hoʻolei ʻana i ka mana i ka wā e hoʻohaʻahaʻa ʻia ana nā ipu, hōʻike maʻamau nā RTG i nā pūʻulu kūʻē nui no ka hoʻopau koke ʻana i ka ikehu mai nā ipu i hoʻohaʻahaʻa a lohi paha. Inā hoʻohana ʻia kahi accumulator, hiki ke waiho ʻia ma nā wahi like ʻole ma ka ʻāina o nā pahu pahu no ka maʻalahi o ka pākaukau RTG.