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  2. Aviator call sign - Wikipedia

    en.wikipedia.org/wiki/Aviator_call_sign

    An aviator call sign or aviator callsign is a call sign given to a military pilot, flight officer, and even some enlisted aviators. The call sign is a specialized form of nickname that is used as a substitute for the aviator's given name.

  3. Play calling system - Wikipedia

    en.wikipedia.org/wiki/Play_calling_system

    A play calling system in American football is the specific language and methods used to call offensive plays.. It is distinct from the play calling philosophy, which is concerned with overall strategy: whether a team favors passing or running, whether a team seeks to speed up or slow down play, what part of the field passes should target, and so on.

  4. Glossary of American football terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_American...

    A kick made to put the ball in play as a kickoff or following a safety (the score; "safety touch" in Canadian football) or fair catch. free play When the defense commits a foul at the time of the snap (usually an offside foul), the offense can play out the rest of the play and either take the five-yard penalty and replay the down or the result ...

  5. Glossary of association football terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_association...

    A player doing a keepie-uppie Association football (more commonly known as football or soccer) was first codified in 1863 in England, although games that involved the kicking of a ball were evident considerably earlier. A large number of football-related terms have since emerged to describe various aspects of the sport and its culture. The evolution of the sport has been mirrored by changes in ...

  6. Call sign - Wikipedia

    en.wikipedia.org/wiki/Call_sign

    Russian nuclear icebreaker Arktika with call sign UKTY. Merchant and naval vessels are assigned call signs by their national licensing authorities. In the case of states such as Liberia or Panama, which are flags of convenience for ship registration, call signs for larger vessels consist of the national prefix plus three letters (for example, 3LXY, and sometimes followed by a number, e.g. 3LXY2).

  7. American football plays - Wikipedia

    en.wikipedia.org/wiki/American_football_plays

    In American football, a play is a close-to-the-ground plan of action or strategy used to move the ball down the field. A play begins at either the snap from the center or at kickoff. Most commonly, plays occur at the snap during a down. These plays range from basic to very intricate. Football players keep a record of these plays in a playbook. [1]

  8. List of symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_symbols

    Shipping symbols [2] from ISO standard 780 "Pictorial marking for handling of goods" [3] or ASTM D5445 "Standard Practice for Pictorial Markings for Handling of Goods" [4] which depict shipping boxes as squares with rounded corners: "Fragile": the silhouette of a broken wine glass "This end up": a horizontal line with two arrows pointing up

  9. Aviation call signs - Wikipedia

    en.wikipedia.org/wiki/Aviation_call_signs

    Administrative call signs are used with air traffic control facilities similar to those of commercial operators. e.g. Navy Alpha-Golf-Two-Zero-One, Reach-Three-One-Seven-Niner Two. [2] Tactical call signs are used during tactical portions of a flight, and they often indicate the mission of the flight or an aircraft's position in a formation.