Harpoon Missile
Why in News: The initial delivery of 100 land-based Harpoon anti-ship missile systems from the United States has reportedly reached Kaohsiung, Taiwan.
About Harpoon Missile:
- Design and Service: The Harpoon (RGM-84/UGM-84/AGM-84) is a subsonic anti-ship cruise missile developed by the United States. It has been in service since 1977.
- Variants: Various versions of the missile have been developed, including those launched from air, ships, and submarines.
- Global Use: The Harpoon is currently used by the armed forces of over 30 countries, including India.
Features:
- All-Weather Capability: It is an all-weather, over-the-horizon missile system designed for anti-ship operations.
- Dimensions: Each missile measures 4.5 meters in length and weighs 526 kilograms.
- Propulsion: The missile is powered by a turbojet engine with a solid propellant booster.
- Cruise and Guidance: It follows a low-level, sea-skimming cruise trajectory and uses active radar guidance, ensuring high survivability and effectiveness.
- Multi-Mission Capability: The Harpoon can carry out both land-strike and anti-ship missions.
- Warhead: It is equipped with a 221-kilogram penetration blast warhead designed for significant impact.
- Navigation: The missile uses GPS-aided inertial navigation to accurately strike its target.
- Range: The Harpoon missile has an operational range of 90 to 240 kilometers.
Mount Erebus
Why in News: In an unusual event, Mount Erebus, Antarctica’s second-largest volcano, is emitting gold dust, leaving scientists utterly astonished.
About Mount Erebus:
- World’s Southernmost Active Volcano: Mount Erebus holds the distinction of being the southernmost active volcano on Earth.
- Location: It is located on Ross Island, Antarctica.
- Discovery: The volcano was discovered in 1841 by British explorer Sir James Clark Ross, who named it after his ship, the Erebus.
- Type: Mount Erebus is a stratovolcano, recognized by its conical shape and composed of layers of hardened lava, tephra, and volcanic ash.
Features:
- Persistent Lava Lake: It is famous for having a long-standing lava lake, active since at least 1972, making it one of the few persistent lava lakes on Earth.
- Eruptions: The lava lake regularly churns and occasionally ejects bombs of molten rock in Strombolian-style eruptions.
- Monitoring: Due to its remote location, scientists monitor the volcano primarily via satellite technology.
- Nearby Settlement: The largest Antarctic settlement, McMurdo Station (operated by the United States), is located about 40 kilometers (25 miles) from Mount Erebus.
White Goods
Why in News: The Department for Promotion of Industry and Internal Trade (DPIIT) has recently urged white goods manufacturers to actively participate in the Production-Linked Incentive (PLI) scheme to take advantage of the fiscal benefits offered for the sector.
About White Goods
- Definition: White goods traditionally refer to large household appliances such as stoves, refrigerators, freezers, and washing machines.
- Origin of the Term: These products were initially available only in white, leading to the term “white goods.”
- Modern Usage: Although now available in various colors, these appliances are still collectively known as white goods.
- Alternative Meanings: The term “white goods” is also used in different contexts beyond home appliances.
- In Fabrics: White goods refer to home products made from linen, cotton, or other white-based materials, such as curtains, towels, and sheets.
- In Alcoholic Beverages: White goods are used to describe colorless spirits, including vodka and gin, in the alcoholic beverage industry.
Kosi River
Why in News: Several areas of Bihar are experiencing severe flooding after the Kosi Barrage in Birpur released large volumes of water, triggered by heavy rainfall.
About Kosi River
Transboundary Nature: The Kosi River flows through China, Nepal, and India and is a key tributary of the Ganges.
Course of the River:
- Origin: The Kosi River is formed by the confluence of three streams—Sun Kosi, Arun Kosi, and Tamur Kosi—all originating in the Himalayan region of Nepal and Tibet.
- Path: About 30 miles (48 km) north of the India-Nepal border, the Kosi is joined by several major tributaries and flows southward through the Siwalik Hills at the narrow Chatra Gorge.
- Emergence in India: The river emerges onto the northern plains of Bihar and flows towards the Ganges, joining it south of Purnea after covering about 450 miles (724 km).
- Drainage Area: The Kosi drains an area of 74,500 sq. km, of which 11,070 sq. km lies within India.
Surrounding Geography:
- The Kosi River valley is bordered by steep margins, isolating it from the Yarlung Zangbo River to the north, the Mahananda River to the east, the Gandaki to the west, and the Ganga to the south.
Unique Characteristics:
- Due to a large deposition of debris, the Kosi lacks a permanent channel in the plains of northern India.
- It is known for its tendency to change its course, generally moving westward. In the last 200 years, it has shifted westward by about 112 km, damaging vast tracts of agricultural land.
“Sorrow of Bihar”:
- The Kosi is often called the “sorrow of Bihar” due to the frequent floods and unpredictable changes in its course, leading to significant human suffering.
Major Tributaries:
- The Kosi has seven major tributaries: Sun Koshi, Tama Koshi, Dudh Koshi, Indravati, Likhu, Arun, and Tamur.