Who should attend. The course is designed for those who may have to conduct or participate in an aircraft accident investigation. This may be in the role of official investigator for a State or as an accredited representative/technical advisor of a manufacturer, operator or service provider.
Before electronic calculators, converting square varas (at 1 vara = 32.8748 inches) to acres was a tedious job. But if 1 vara = 33 1/3 inches, 3 varas are exactly 100 inches, 36 varas are exactly 100 feet, and 108 varas are exactly 100 yards. An easy division and some shuffling of the decimal point do the job.
Foot is an imperial and US customary length unit and defined as 0.3048 meters (30.48 centimeters or 12 inches). There are 5280 feet in a mile (US and UK), 6076 feet in a US nautical mile and 6080 feet in a UK nautical mile. The abbreviation is ft.