Grade 10 – Maritime Economics

October 9, 2015

Tugs and Offshore Service Vessels

When ships come into harbour, or leave a harbour, they require assistance to manouevre in the restricted harbour area. Therefore, harbour tugs have developed over the years to help ships turn, to push them carefully against a wharf when berthing, or to tow them away from that wharf when the […]
September 29, 2015


In all ports, sand/mud accumulates and needs to be removed by specially designed ships called dredgers that suck up the sand from the bottom of the harbour, and carry it out to sea where it is dumped. These are known as suction dredgers. Some ports do not have much sand […]
September 30, 2015


The impressive United States aircraft carrier USS Theodore Roosevelt is shown below during her visit to Cape Town in 2007. Aircraft are stowed below deck and are lifted onto the flight deck (the large flat deck shown here), prepared for take-off and take off from the flight deck. They land […]
September 27, 2015

General terminology relating to ships

Ballast Sea water that is pumped into the ship’s tanks to trim the ship, i.e. to ensure that she is not too high in the bow, or too high in the stern, or listing (leaning to one side) when putting to sea. Ballast is also put into a ship’s tanks […]
September 27, 2015

Test yourself: 10.1.1 Terminology

1.  With her own cranes, Artemis was loading 28 000 tons of steel in Durban, the 4320-TEU Oscilla was discharging containers, Ulwandle was working 13 000 tons of break-bulk cargo and 242 containers, and Capetan Andros was loading 25 000 tons of coal. Heron was clearing mud from the bed […]