October 21, 2015

Tides and their formation

The gravitational pull of the moon and the sun have an effect on the oceans, raising the water level on one side of the earth and causing a high tide. Because of the rotation of the earth, centrifugal force causes the water level to rise on the opposite side of […]
October 21, 2015

Ocean Currents

  Ocean Currents Numbers refer to the currents shown on the map. Warm Currents flowing from the tropical regions 1. Mozambique Current 2. Agulhas Current, 3. Brazilian Current 4. Gulf Stream 5. North Atlantic Drift (a relatively warm current in the area close to North-west Europe). 6. South Equatorial Current Cold Currents flowing from the polar […]
October 21, 2015

Meteorological factors that impact on shipping

The ocean has many moods. On some days, it is beautifully calm and shipping operations can continue without interruption. On other days, the ocean can be wild, with enormous swells that have a negative effect on shipping operations and can even be extremely dangerous to ships. Similarly, windy conditions can […]
October 22, 2015

The fragility of marine ecosystems and the need to safeguard such systems

Concept of Ecosystems The marine ecosystem includes the oceans, the inter-tidal zone along shorelines, river mouths, lagoons and the seabed. Within that sphere, a system exists where minute plant life supports the lowest level of animal life, which, in turn, supports a longer chain where animals on one level are […]
October 22, 2015

Extraction of marine resources

In some areas, the seabed is a source of diamonds, while beneath the seabed – sometimes at considerable depth – lie oil and gas, and perhaps other minerals. To find and recover diamonds or to prospect for and produce oil or gas from below the seabed present difficulties and require […]