The radian is the SI unit (symbolrad) of plane angles, an alternative unit to the degree. It is the angle at the centre of a circle when the centre is joined to the two ends of an arc equal in length to the radius of the circle. There are 2 pi (approximately 6.284) radians in a full circle (360 degrees). One radian is approximately 57 degrees, and 1 degree is pi/180 or approximately 0.0175 radians. Radians are commonly used to specify angles in polar co-ordinates. Research Radian
The Al Mua'zzar is a British built, Oman Qahir Class corvette. The ship is based on a stealth version of the proven Mark 9 corvette. The hull and superstructure have been designed to minimise the radar cross section with features including the cladding of surfaces with radar absorbent material and angled sides to reduce the return signal to hostile radars. The Qahir Al Amwaj class has speed of 25 knots in rough conditions. The maximum speed is attainable up to Sea State 5 and speed in excess of 15 knots is attainable in Sea State 6.
The ship is equipped with the Exocet MM40 Block 2 missile. The two Exocet launchers each loaded with four missiles are located on the forecastle behind the Otobreda Super Rapid gun. The ship's short range surface-to-air missile system is the Thomson-CSF Crotale NG launch unit with the VT-1 missile. The Crotale eight-round launcher is mounted aft of the funnel. The electrically driven turret weighs four tons and includes a surveillance radar, identification friend or foe, an electro-optical system, and two banks of four VT-1 missiles. The launcher slews round to the detected target at five radians per second horizontally and one radian per second vertically. Installed on the forecastle of the corvette is an Otobreda 76 millimetre 62 Super Rapid gun, with a range of 16 kilometres and a firing rate of 120 rounds per minute. On each side of the ship on the port and starboard side decks is an Oerlikon/ BAE Systems 20 millimetre gun, model GAM-BO1. The flight deck aft is of sufficient size to launch or recover a helicopter to the size of a Super Puma. The ship is designed for operation with a complement of 60 crew. Accommodation is provided for nine officers, 21 senior ratings and 30 junior ratings. Research Al Mua'zzar
The Qahir Al Amwaj is a British built, Oman Qahir Class corvette. The ship is based on a stealth version of the proven Mark 9 corvette. The hull and superstructure have been designed to minimise the radar cross section with features including the cladding of surfaces with radar absorbent material and angled sides to reduce the return signal to hostile radars.
The Qahir Al Amwaj class has speed of 25 knots in rough conditions. The maximum speed is attainable up to Sea State 5 and speed in excess of 15 knots is attainable in Sea State 6. The ship is equipped with the Exocet MM40 Block 2 missile. The two Exocet launchers each loaded with four missiles are located on the forecastle behind the Otobreda Super Rapid gun. The ship's short range surface-to-air missile system is the Thomson-CSF Crotale NG launch unit with the VT-1 missile. The Crotale eight-round launcher is mounted aft of the funnel. The electrically driven turret weighs four tons and includes a surveillance radar, identification friend or foe, an electro-optical system, and two banks of four VT-1 missiles. The launcher slews round to the detected target at 5 radians per second horizontally and 1 radian per second vertically. Installed on the forecastle of the corvette is an Otobreda 76 millimetre 62 Super Rapid gun, with a range of 16 kilometres and a firing rate of 120 rounds per minute. On each side of the ship on the port and starboard side decks is an Oerlikon/BAE Systems 20 millimetre gun, model GAM-BO1. The flight deck aft is of sufficient size to launch or recover a helicopter to the size of a Super Puma. The ship is designed for operation with a complement of 60 crew. Accommodation is provided for 9 officers, 21 senior ratings and 30 junior ratings. Research Qahir Al Amwaj
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Radian
