The group repetition interval in micro- seconds divided by 10
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GROUP REPETITION INTERVAL
The specified time interval of a Loran C chain for all stations of the chain to transmit their pulse groups. For each chain a minimum group repetition interval (GRI) is selected of sufficient duration to provide time for each station to transmit its pulse group and additional time between each pulse group so that signals from two or more stations cannot overlap in time anywhere within the coverage area. The GRI is normally stated in terms of tens of microseconds; i.e., the GRI having a duration of 79,900 microseconds is stated as 7900.
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GROUP OCCULTING LIGHT
An occulting light in which the occultations are combined in groups, each group including the same number of occultations, and in which the groups are repeated at regular intervals. The intervals of light separating the occultations within each group are of equal duration and this duration is clearly shorter than the duration of the interval of light between two successive groups.
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GROUP QUICK LIGHT
A quick flashing light in which a specified group of flashes is regularly repeated
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GROUP FLASHING LIGHT
A flashing light in which the flashes are combined in groups, each group having the same number of flashes, and in which the groups are repeated at regular intervals. The eclipses separating the flashes within each group are of equal duration and this duration is clearly shorter than the duration of the eclipse between two successive groups.
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GROUP VERY QUICK LIGHT
A very quick flashing light in which a specified group of flashes is regularly repeated.
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SULFONIC
A specific acidic group (SO3H) on which depends the exchange activity of certain cation adsorbents.
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CARBOXYLIC
A term describing a specific acidic group (COOH) that contributes cat ion-exchange ability to some resins.
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INTERROGATION
The transmission of a radio frequency pulse, or combination of pulses, intended to trigger a transponder or group of transponder.
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TORPEDO BOAT DESTROYER
A type of fast and maneuverable small warship introduced in the 1890s to protect capital ships from torpedo boat attack, since increased in size and capabilities to become a longendurance warship intended to escort larger vessels in a fleet, convoy, or battle group and defend them against submarines, surface ships, aircraft, and missiles.
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LOOSE CANNON
An irresponsible and reckless individual whose behavior (either intended or unintended) endangers the group he or she belongs to. A loose cannon, weighing thousands of pounds, would crush anything and anyone in its path, and possibly even break a hole in the hull, thus endangering the seaworthiness of the whole ship.
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