Semester at Sea Atlantic or west across the Pacific, visiting from 10 to 11 countries in Asia, Africa, Europe, South America and North America. The program previously had voyages that would sail through the Mediterranean and the Suez Canal, but due to piracy concerns in the Gulf of Aden, voyages now typically travel around Africa. For many years, ISE hosted a shorter 65-day Semester at Sea program in the summer that concentrated on one general region of the world. In May 2011, Semester at Sea introduced a new short-term or Maymester voyage with a curriculum focused on the UN Millennium Development Goals. These
East Africa main goal on the Swahili coast was to take control of the spice trade from the Arabs. At this stage, the Portuguese presence in East Africa served the purposes of controlling trade within the Indian Ocean and securing the sea routes linking Europe to Asia. Portuguese naval vessels were very disruptive to the commerce of Portugal's enemies within the western Indian Ocean and were able to demand high tariffs on items transported through the sea due to their strategic control of ports and shipping lanes. The construction of Fort Jesus in Mombasa in 1593 was meant to solidify Portuguese hegemony