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Using the codes eases coordination and improves understanding during multiservice operations. The codes are intended for use by air, ground, sea, and space operations personnel at the tactical level. Code words that are followed by an asterisk (*) may differ in meaning from NATO usage. There is a key provided below to describe what personnel ...
Two-letter signals for other messages, sometimes followed with a numerical "complement" which supplements or modifies the message. Three-letter signals beginning with "M"; these are the Medical Signal Codes. In some cases, additional characters are added to indicate quantities, bearing, course, distance, date, time, latitude, or longitude.
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 February 2025. Letter names for unambiguous communication Not to be confused with International Phonetic Alphabet. Alphabetic code words A lfa N ovember B ravo O scar C harlie P apa D elta Q uebec E cho R omeo F oxtrot S ierra G olf T ango H otel U niform I ndia V ictor J uliett W hiskey K ilo X ray L ...
Letter flags and ICS meanings Letter / radio name Flag Blazon ICS meaning as single flag Meaning when used with numeric complements A Alfa: Swallowtailed, per pale argent and azure "I have a diver down; keep well clear at slow speed." Azimuth or bearing B Bravo: Swallowtailed, gules "I am taking in or discharging or carrying dangerous goods."
On the beam; a relative bearing at right angles to the ship's keel; e.g. describing an object located at a bearing of 90 degrees or 270 degrees as measured clockwise from the ship's bow. [7] able seaman (AB) Also able-bodied seaman. A merchant seaman qualified to perform all routine duties on a vessel, or a junior rank in some navies.
The complete nomenclature consists of an Approved Item Name (AIN), an extended modifier (if applicable), and the type designation. The AIN is presented in all capital letters, is not abbreviated, and is followed by a colon. Each AIN has a corresponding 6-digit Item Name Code (INC) which can be referenced in the H6 Cataloging Handbook.
S is the Sommerfeld Number or bearing characteristic number r is the shaft radius c is the radial clearance μ is the absolute viscosity of the lubricant N is the speed of the rotating shaft in rev/s P is the load per unit of projected bearing area. The second part of the equation is seen to be the Hersey number.
the Q-code for: Atmospheric pressure at aerodrome elevation (or at runway threshold) QNE: the Q-code for pressure altitude: QNH: the Q-code for: Altimeter sub-scale setting to obtain elevation when on the ground, i.e. altitude above MSL: QRA quick reaction alert: QRH quick reference handbook: QTOL: quiet take-off and landing [19]