Two units (equivalent to two years or four semesters) of laboratory science are required (three units are strongly recommended), providing fundamental knowledge in two of the following disciplines: 1  Biology. 2  Chemistry. 3  Physics.
Slave forts were established all along the coast of West Africa, to house captured Africans in holding pens (barracoons) awaiting transport. They were equipped with up to a hundred guns and cannons to defend European interests on the coast, by keeping competitors at bay. There were approximately 80 castles dotted along the slave-trading coast.
In Spanish this type was called carraca or nao, in Portuguese it was called nau (which meant simply ship), in French it was nef, and English military carracks were called great ships. Catamaran: A catamaran (from Tamil kattu to tie and maram wood, tree) is a type of boat or ship consisting of two hulls joined by a frame.