Naval Analyses: PHOTO GALLERY #21: Otra, minesweeper of the Royal Norwegian Navy

Otra, minesweeper of the Royal Norwegian Navy, alongside HMS Ramsey

This is the fourth photo gallery (see previous posts) from my visit to Kiel, on the first weekend of the 136th Kiel Week. The Kiel Week (German: Kieler Woche) or Kiel Regatta is an annual sailing event in Kiel, the capital of Schleswig-Holstein, Germany. The first weekend of the Kiel Week, the famous Naval Base of Kiel, opens its gates for just four hours per day, for thousands of tourists who are eager to visit the German Navy warships and dozens of foreign warships which visit the city of Kiel, to honor the Kiel Week. Τhe Royal Norwegian Navy was represented by the Μ351 Otra, an Alta class minesweeper with mine hunting capabilities. The Alta class was built by Kværner Mandal during 1996 and 1997; a total of 5 vessels were built but currently only three are active. The 400-ton Alta class vessels are air-cushioned vehicles of catamaran design. The catamaran hull is built in a fibre-reinforced plastic sandwich of very low magnetic signature. Two large fans located on each side create an air cushion between the two hulls and a front and aft rubber skirt, lifting the vessel, giving small drag and a high cruise speed, as well as low susceptibility to the shock of exploding mines since only a small portion of the hull is actually exposed in the water. Propulsion by water jet, again one in each hull, gives a low acoustic signature. A degaussing system gives the vessels extremely low electromagnetic signature. The vessels of the class are armed with two MH2B 12.7mm heavy machine guns, four to six MG3 machine guns and a Simbad Mistral SAM launcher. Enjoy photos from my visit aboard HNoMS Otra, a very interesting design!