The 747-400 is the second-most recent version of the Boeing 747 aircraft family, having been superseded by the more economical and advanced Boeing 747-8.Following its introduction in 1969, the Boeing 747 became a major success with airlines and the flying public.he 747-400 is equipped with a two-crew glass cockpit, which dispenses with the need for a flight engineer, along with more fuel-efficient engines, an optional fuel tank in the horizontal stabilizer, and revised fuselage/wing fairings.
Overall scores of 70% or over for a dressage test are considered very good, scores of 60-70% are considered good and if a horse and rider are consistently scoring 60%+ at any level of dressage competition this indicates that horse and rider are ready to move onto the next level.
The different size dressage arena markings. The images here, show the dressage arena letter layouts for a 20x40m arena (top) and a 20x60m arena (bottom). The images show the location of the letters that denote particular points in the dressage arena. Arena sizes can vary slightly depending on the organisation hosting the dressage competition. The British Dressage standard size arena is usually 40 metres by 20 metres for prelim and novice tests and 20 metres by 60 metres for advanced novice and grand prix competitions.