Algeciras (/ˌældʒɨˈsɪrəs/; Spanish pronunciation: [alxeˈθiɾas]) is a port city in the south of Spain, and is the largest city on the Bay of Gibraltar (in Spanish, the Bahía de Algeciras). The Port of Algeciras is one of the largest ports in Europe and in the world in three categories: container, cargo and transhipment. It is situated 20 km north-east of Tarifa on the Río de la Miel, which is the southernmost river of the Iberian peninsula and continental Europe. In 2012, it had a population of 116,917 people.
Container cranes consist of a supporting framework that can traverse the length of a quay or yard, and a moving platform called a "spreader". The spreader can be lowered down on top of a container and locks onto the container's four locking points ("cornercastings"), using a twistlock mechanism. Cranes normally transport a single container at once, however some newer cranes have the capability to pick up two to four 20-foot containers at once.