What is "blue flag"

n. A quality award given to European beaches, based on cleanliness and water quality.

n. a common iris of the eastern United States having blue or blue-violet flowers; root formerly used medicinally [syn: Iris versicolor]

Blue flag or Blue Flag may refer to:

• Blue Flag beach, a beach or marina that meets certain quality standards
• Blue Flag, the flag of Chelsea F.C.
• Blue flag, a particular Flag#Swimming flags
• Blue flag, a particular Racing flags#Blue flag

• Larger Blue Flag or , a type of iris
• Slender Blue Flag or , a type of iris

• Blue flag, a particular Flag#Railway flags in railway use.
• Blue sign used by European waterways vessels passing on the starboard side

• Blue Flag (Israeli Air Force exercise), the name of an Israeli Air Force exercise
• Blue Flag (United States Air Force exercise), the name of a United States Air Force command and control exercise

• Blue Flag, common representation of the street gang Crips

Blue Flag is an exercise of the United States Air Force that trains participants at the operational level of war. It is administered by the 505th Combat Training Squadron at Hurlburt Field with the goal of every numbered Air Force to participate every two years.

Blue Flag is a military aviation exercise held by the Israeli Air Force. It first took place in November 2013 at Ovda Air Force Base in Israel. The exercise, which included the participation of several foreign air forces, was aimed at expanding international cooperation. Plans on making "Blue Flag" a biennial event were realised in 2015 with another "Blue Flag" exercise in the which the air forces of the United States, Greece and Poland also participated.