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Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each.
Donated by the Auction Bridge Club of Chicago in 1929, the trophy was originally awarded by the American Bridge League to the winners of the National Contract Championships Open Contract Team-of-Four (board-a-match scoring), [5] which became the North American Open Teams Championship held by the American Contract Bridge League.
The American Contract Bridge League (ACBL) is a governing body for contract bridge in the United States, Canada, Mexico, and Bermuda. [1] It is the largest such organization in North America having the stated mission "to promote, grow and sustain the game of bridge and serve the bridge-related interests of our Members." Its major activities are:
The Official Encyclopedia of Bridge (OEB) presents comprehensive information on the card game contract bridge with limited information on related games and on playing cards. It is "official" in reference to the American Contract Bridge League (ACBL) which authorized its production and whose staff prepared and/or supervised its various editions.
North American Collegiate Bridge Championships are an intramural college competition run by the American Contract Bridge League. [1] The finals are held every summer in conjunction with the North American Bridge Championships. Any college in the United States, Canada, Mexico and/or Bermuda is eligible to participate in the event.
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The Rockwell Mixed Pairs is a national bridge championship held regularly at the Spring American Contract Bridge League (ACBL) North American Bridge Championship (NABC). The Rockwell Trophy, donated by Helen Rockwell in 1946, is presented to the winners. Originally contested at the Fall NABC, the event was moved to the Spring NABC in 1986.