Ascension was first discovered in 1501 by Juan da Nova Castella, but the discovery apparently went unrecorded, and the island was re-discovered on Ascension Day 1503 by Alfonso d'Albuquerque. Subsequently, Ascension was little visited; it was too dry and barren to be of any use to the
Thursday, April 30, 2009
Georgetown, Ascension
Celebration of Koninginnedag
In
Electronic Gyro Compass
Due to the earth’s magnetic field, there is a difference between the actual north and the north which is indicated on the ship’s magnetic compass. The difference can be as big as 13 degrees east. The earth’s magnetic field is also constantly in motion, so small changes occur over the years. The main compass used for navigation on board the
Tuesday, April 28, 2009
Jamestown, St. Helena
Saint Helena is a
The Island Of St. Helena
Some 1200 miles off the coast of
Sunday, April 26, 2009
To Anchor the Ship
When anchoring a ship, the Captain takes the following into consideration: the depth of the water, if the water is too deep the anchor might drag. The type of bottom that will best hold the anchor. Not close to navigation hazards and as far away from other ships as possible. Do not anchor in harbor traffic lanes and choose the area with the weakest winds and currents. Find a place with a lot of navigational aids (landmarks, etc.) to monitor the ship’s position. The Ms Rotterdam has 2 anchors forward and 1 astern. The forward anchors each weigh 8 tons.
The Pink Panther
Contrary to popular belief the “Pink Panther” is not the Inspector Clouseau character made famous by actor Peter Sellers, but a large and valuable fictitious diamond. It bears that name because the flaw at its center, when viewed closely, is said to resemble a leaping pink panther.
Benguela Current
Being pushed in the stern by the Benguela Current after sailing out of
Saturday, April 25, 2009
Walvis Bay, Namibia
The first European visitors were Portuguese mariners seeking a way to the
Friday, April 24, 2009
Lüderitz, Namibia
This harbor town in southern
The Orange River
On our way north to the city of
Thursday, April 23, 2009
The Flying Dutchman
After leaving the
Tuesday, April 21, 2009
The Role of Art in African Society
The multiple roles that art plays in African communities are as diverse as their forms of patronage.
Social Role: One of the most important functions of African art is distinctly social. In fulfilling this role, it frequently depicts women as mothers, usually nursing or cradling their young. Men, on the other hand, are often presented both as elders, the traditional community leaders, and as successful warriors.
Political Role: Political control is another major concern displayed through art in
Economic Role: Art in
Historical Role: An important historical role is also fulfilled in African art through its memorialization of important persons and events. In the powerful kingdom of Benin in Nigeria, elaborate relief plaques cast in bronze similarly carried images of important persons and events of the past, including battle scenes and religious ceremonies.
Signal Hill ( Noon Gun )
Signal Hill is a landmark flat-topped hill located in
Monday, April 20, 2009
Cape Town, South Africa
Early Cape Town History
The area known as
Sunday, April 19, 2009
Cape Agulhas ( Cape of Needles )
Today we sail on a southwesterly course following the southeast coast of
Languages of South Africa
Saturday, April 18, 2009
Durban, South Africa
Thursday, April 16, 2009
What Is Seawater?
Seawater is a dilute solution of several salts resulting from weathering and erosion of rocks. The salinity of seawater is expressed in terms of total dissolved salts in parts per thousand parts of water. Salinity varies from nearly zero in continental waters to about 41 parts per 1,000 in the Red Sea, a region of high evaporation, and more than 150 parts per 1,000 in the
Traveling Around the World
Any traveler circling the globe in a westward direction lengthens the day by 1 hour for every 15° of longitude traveled because the traveler is following the apparent motion of the sun; by the time he or she has traveled completely around the world, the traveler is one full day ahead of the people who have remained at the starting place of the trip. Similarly, going eastward, a traveler arrives a day behind. Close to the 180th meridian, nearly in the middle of the
of land and of civilization in the region, navigators going westward add a day to their calendars (for example, the day after February 11 would be February 13), and navigators going eastward drop a day from their calendars to correct for this gain or loss of time. The date line is curved eastward around Siberia, westward around the Aleutian Islands, and eastward around the
The Global Positioning System (GPS)
The Global positioning system (GPS) is a navigation system using 24 Earth-orbiting artificial satellites. Satellite navigation, like celestial navigation, works on the principle that if the navigator knows the exact location of a celestial body and can measure a relationship between the craft and the body, the navigator can calculate the craft’s position. In celestial navigation, this relationship takes the form of a celestial body’s altitude above the horizon.
South Africa’s Zulu
The fabled Zulu, the largest South African ethnic group, (10-11 million), live mainly in the
Richards Bay, South Africa
The
The Bulbous Bow of a Ship
The bulbous bow of a ship increases the hull efficiency and reduces fuel costs. The bulb puts the bow wave further forward. The actual beginning of the bow of the ship will be at the trough of the bow wave, thus the bow does not need to push against a ‘wall of water’. The bulb stem also has a favorable effect on the wave system around the ship. The ideal situation is one where the ship cuts through the waves, whilst generating no waves by itself; for every wave that is created by the ship is lost energy.
Speedometer
Accurate speedometers came into popular use in the latter half of the 19th century. Until this time, most sailors estimated their speed with a chip log, a float affixed to a rope knotted at intervals of 47.25 feet, 14.4 meters. Navigators threw the float off the boat and counted the knots as they hit the water. The navigators timed their count, using a 28-second sandglass to ensure consistency. The number of knots that ran out in 28 seconds equaled the boat’s speed in nautical miles.
Sand Waves
A type of ground surface, this is sand which forms a wave type structure on the bottom of the sea or water body due to the tidal and current activity.
Latitude and Longitude
Latitude and Longitude is a system of geometrical coordinates used in designating the location of places on the surface of the earth. Latitude, which gives the location of a place north or south of the equator, is expressed by angular measurements ranging from 0° at the equator to 90° at the poles. Longitude, the location of a place east or west of a north-south line called the prime meridian, is measured in angles ranging from 0° at the prime meridian to 180° at the International Date Line.
Islands in the Pacific Ocean
The Islands in the Pacific Ocean, in total land area, is slightly larger than
Echo Sounder
This is an electronic depth sounder that sends a signal down and times how long the signal takes to rebound. The longer the delay, the deeper the water. Regular depth soundings help the navigator avoid straying into dangerous, shallow water. They also can help the navigator locate the craft’s position on a chart with relatively good accuracy because many nautical charts show water depth at regular intervals.
Maputo, Mozambique
Formerly known as Lourenço Marques,
Wednesday, April 15, 2009
The Afrikaners of South Africa
Afrikaners are South Africans of Dutch or French Huguenot descent that was known primarily as Boers, from the Dutch word for farmer. Afrikaners make up approximately 56 percent of
Europa Island
During our transit of the Mozambique Channel we will pass 2 small