The magnetic poles are the two points on the surface of the Earth at which the magnetic field points vertically down or up (in the northern and southern hemispheres respectively). These points are located near, but not at the northern and southern geographic poles.
Teak is the common name for the Tectona grandis, a member of the verbena family native to the hardwood forests of India, Burma (Myanmar), Thailand, Malaysia, and Indonesia. It is a large deciduous tree, growing to a height of 130 feet, with gray and grayish brown branches.
In a move reminiscent of the Athos Canal, built 483-480 BC at the direction of the Persian Emperor Xerxes, or the Corinth Canal, built in the 1890’s by the Greek Government, Norway has tentatively approved construction of a tunnel through the…
The United States Navy disposes of many of its old, obsolete, and decommissioned warships by sinking them in deep ocean waters. This practice, called a sinking exercise or SINKEX, involves removing toxic and hazardous substances to the maximum practicable extent…
The Xue Long (Snow Dragon) is the premier polar vessel of the People’s Republic of China. It was built in the Ukraine in 1993 and modified upon its acquisition by China in 1994. Its major function is to serve as a resupply vessel and scientific research platform in the Antarctic and the Arctic.
Little is known of Henry Hudson prior to 1607, when he was hired by the Muscovy Company of the Kingdom of England to find a northern route to the Far East. He and a crew of ten sailed on the 80-ton Hopewell. They reached the east coast of Greenland and traveled north to the ice pack.
Alfred Thayer Mahan (1840-1914) was born at West Point, where his father was an instructor. After graduating with distinction from the US Naval Academy in 1859, he served blockade duty on a number of warships during the Civil War. Mahan was promoted at…
Nikumaroro (previously known as Gardner Island) is a small coral atoll in the central Pacific Ocean situated just south of the Equator and just west of the 180th meridian. It lies in the Phoenix Island Chain and is part of the Republic of Kiribati.
The Thames Barrier is a 1,710-foot wide movable flood control barrier across the River Thames just downstream from central London. After a ten-year construction period, it was officially opened by Her Majesty Queen Elizabeth II on May 8, 1984.
The Turkish Straits consist of two narrow straits in northwestern Turkey, the Bosporus and the Dardanelles, and the Sea of Marmara that connects them. The Turkish Straits lie between the Black Sea to the east and the Aegean Sea, which is a region of the much larger Mediterranean Sea.
The US Coast Guard adopted the concept of geographic districts when it absorbed the US Lighthouse Service in 1939. Previously, it had no formal segmentation of its chain of command based on geography. Rather, the chain of command was grouped around function.
The trireme was utilized as a warship in the Mediterranean Sea from the 7th century BC until the fall of the Roman Republic at about the commencement of the Christian era. No other warship design has survived in service for a comparable period. It was truly the dominant battleship of its day.