On metric vs US weights and measures - oh, the insanity of it all...
Things in Canada are sold in both metric and/or in US weights & measures plus we also have "soft" conversions and "hard" conversions. On a 2x4 for ex., our building code is metric and designates a 2x4 as 38x89mm but if you asked for a few 38x89 at a lumber yard they would think you're from another planet. A 2x4 is sold by lengths in feet. A sheet of plywood is exactly 4'x8' and sold as 4'x8' but the thicknesses are labelled metric. A 1/2" sheet for ex. is 12 mm (soft) but some offshore plywood is sometimes a bit off from 12mm. Can make cabinetmaking a hassle here. In the US, a sheet of 3/4" plywood is actually 23/32". Our US-made F250 is all metric and the volume of a bottle of hard liquor from the US is in liters. The decision to go metric was simply a political one by the prime minister at the time, Justin Trudeau's father.
Perhaps the most well-known example of a potential catastrophe on gallons/liters conversion is back in 1983, when a Boeing 737 ran out of fuel at 41,000 ft. over Ontario. The pilots were fortunately able to glide it to a safe landing in Gimli, Man. The cause was later found to be due to a math error in conversion between liters and gallons by the ground crew. The pilots initially took some of the blame. In '85 they received an international award for their achievement. Landing the plane was quite a feat - when they tried to duplicate it in a simulator, all attempts ended in crashes. It has become to be known as the "
Gimli glider".
A mile is a lot longer at app. 1.6 km/mile and when in the US, the miles click by a lot slower and it takes us waaay longer to get anywhere... So annoying!