Transshipment problems form a subgroup of transportation problems, where transshipment is allowed. The port's main activities are petrochemical industries and general cargo handling and transshipment. Examples are courier, express and parcel services; ocean carriers, freight forwarders and transshipment providers. The port also serves as an international refueling center and transshipment hub. The Company focuses its business on the transshipment of general and bulk cargo. At present, the port handles 15% of transshipment cargo in South Asia. The activities included import, export and transshipment delivery and payment. Transshipment usually takes place in transport hubs. The port ranks as a major transshipment point in region. Kingston became an important port as businesses relating to transshipment, or forwarding, grew. The Baltimore and Ohio Railroad made the port a major transshipment point. The port of Zaporizhia is an important place of transshipment for goods from the Donbas. A cruise terminal is under construction at Vizhinjam Transshipment Terminal. This allows easy transshipment to a third country without customs authorities being involved. Extensive transshipment yards were constructed at Broken Hill in 1942 to allow transshipment of munitions.