letter designation
1Letter beacon — Signal of letter beacon D on 5137.5 kHz Letter beacons are radio transmissions of uncertain origin, which consist of only a single repeating Morse Code letter. They are also often referred to as: SLB, or Single Letter Beacons SLHFB, or… …
2Provisional designation in astronomy — is the naming convention applied to astronomical objects immediately following their discovery. The provisional designation is usually superseded by a permanent designation once a reliable orbit has been calculated. In the case of asteroids, so… …
31962 United States Tri-Service aircraft designation system — Prior to the 1962 tri service designation system, the F 4 Phantom II was designated F4H by the U.S. Navy, and F 110 Spectre by the U.S. Air Force. The 1962 United States Tri Service aircraft designation system is a unified designation system… …
4Bayer designation — A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation s Latin name. The original list of Bayer designations contained 1,564 stars.Most of… …
5United States Department of Defense aerospace vehicle designation — A United States Department of Defense aerospace vehicle designation is determined by a detailed protocol which identifies all aircraft, helicopters, rockets, missiles, spacecraft, and other aerial vehicles in military use by the United States… …
6Rural Letter Carrier — Rural Letter Carriers deliver mail in what was traditionally considered rural areas of the United States. The rural carrier work force is comprised of the following categories of employees:Regular Carriers (Designation Code 71) For administrative …
7Japanese military aircraft designation systems — Japanese military aircraft, especially of Japan s Imperial (pre 1945) period, are rather difficult to keep track of by their Japanese designations, primarily because multiple designation systems were in use by each armed service. This is what led …
8Joint Electronics Type Designation System — The Joint Electronics Type Designation System (JETDS), which was previously known as the Joint Army Navy Nomenclature System (AN System) and the Joint Communications Electronics Nomenclature System, is a method developed by the U.S. War… …
9RETMA tube designation — The Radio Electronics Television Manufacturers Association was formed in 1953, as a result of mergers with other trade standards organisations.They were principally responsible for the standardised nomenclature for American vacuum tubes.American… …
10Variable star designation — Variable stars are named using a variation on the Bayer designation format of an identifying label (as described below) combined with the Latin genitive of the name of the constellation in which the star lies. See List of constellations for a… …
