comfort zone [BACK TO TOP] Meaning: The temperature range (between 28 and 30 degrees Centigrade) at which the naked human body is able to maintain a heat balance without shivering or sweating
OET is an English language test that assesses the language and communication skills of healthcare professionals who seek to register and practise in an English-speaking environment.
SIGMET, or Significant Meteorological Information, is a weather advisory that contains meteorological information concerning the safety of all aircraft. There are two types of SIGMETs - convective and non-convective. The criteria for a non-convective SIGMET to be issued are severe or greater turbulence over a 3,000-square-mile (7,800 km2) area, severe or greater icing over a 3,000-square-mile (7,800 km2) area or IMC over a 3,000-square-mile (7,800 km2) area due to dust, sand, or volcanic ash.