depression definition. A period of drastic decline in the national economy, characterized by decreasing business activity, falling prices, and unemployment. The best known of such periods is the Great Depression, which occurred in the 1930s.
A variometer â also known as a rate of climb and descent indicator (RCDI), rate-of-climb indicator, vertical speed indicator (VSI), or vertical velocity indicator (VVI) â is one of the flight instruments in an aircraft used to inform the pilot of the rate of descent or climb.
SI Speed (Velocity) Calculator. Please Enter the Quantity You Would Like to Convert. The Amount Of Quantity Must be a Numeric Value. Meter per second is the most common unit of speed measurement By using our metric speed unit calculator you can convert speed - velocity measurements listed below: Centimeter/Second Symbol is cm/sec. Feet/Second Symbol is ft/sec. Kilometer/Hour Symbol is km/h, kmph.