They were marketed from the early 1960s and quickly became popular, predominantly for recreation, in both the United States and Canada, originally called all-terrain vehicle (ATV).
Because they were smaller and much simpler in construction than amphibious cars, they were much cheaper to produce and quickly gained considerable popularity.
In contrast to today's ANSI definition of an ATV: "a vehicle that travels on low pressure tires, with a seat that is straddled by the (single) operator, and with handlebars for steering control", an AATV is intended for multiple riders, sitting inside, and will usually have two control sticks (and in some cases a steering wheel or joystick) rather than motorcycle-type handle bars as stipulated in the current definition.
Most contemporary designs use garden tractor type engines, that will provide roughly 25 mph (40 km/h) top speed.
[3][4] Though not as fast as a straddled ATV, the amphibious 6x6 and 8x8 can be operated with precision at slow speeds, carry more passengers and cargo, and has the ability to float.
[3][5] A partial list of the more than 70 manufacturers of AATVs in the 1960s and 1970s: Although amphibious ATVs are not widely known today, they can be found everywhere from a farm to the oil fields.