Release Time

Released Time is a concept used in the United States public school system wherein pupils enrolled in the public schools are permitted by law to receive religious instruction. The principle is based on the constitutional right of parents to direct the religious education of their children.
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1. The time interval between (a) the instant that an enabling signal (as in a vogad or echo suppressor) is discontinued, and (b) the instant at which suppression ceases. (188 ) 2. The time interval between (a) the instant a relay coil is de-energized, and (b) the instant that contact closure ceases (or, depending on the nature of the relay, is established). (188 )

[ICAO]
Time prior to which an aircraft should be given further clearance or prior to which it should not proceed in case of radio failure.
 

A departure time restriction issued to a pilot by ATC (either directly or through an authorized relay) when necessary to separate a departing aircraft from other traffic.
(See ICAO term RELEASE TIME.)
 

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