Mile Parliament, which set it as a distance of 1,760 yards. Under American law, however, the "statute mile" refers to the US survey mile. Foreign and historical units translated into English as miles usually employ a qualifier to describe the kind of mile being used but this may be omitted if it is obvious from the context, such as a discussion of the 2nd-century Antonine Itinerary describing its distances in terms of "miles" rather than "Roman miles". The mile has been variously abbreviated—with and without a trailing period—as m, M, ml, and mi. The American National Institute of Standards and Technology
Metric mile leg of a distance medley relay uses a four lap 1600 m leg; The standard middle distance in many United States high school competitions is 1600 m and this distance is sometimes referred to as a metric mile as well. In swimming, the 1500 m (or 1650 yards) race is commonly referred to as "the swimmer's mile", and is often the longest distance swum by competitors in a pool. The standard distance triathlon also employs the swimmer's mile, except in open water instead of a pool. Metric mile A metric mile is a distance which approximates one statute mile (1609.344