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Data updated: 16 Jan 2026.
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Document ID:
MIL-A-21555
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Overview
Title:
Antenna AT-781A/U (No S/S Document)
Scope:
This specification covers one type of UHF Antenna, athe AT-781A/U, a circularly polarized omnidirectional antenna with a frequency range of 406 through 549 megacycles (mc) for use aboard ship.
Status:
Canceled
Cancellation Date:
08-JUL-1988
FSC/Area:
1430
Doc Category:
Detail Specification
Responsibilities
Lead Standardization Activity:
70
Air Force Sustainment Center - Ogden
Preparing Activity:
AS
Naval Air Systems Command
Coordination:
Limited
Navy Custodian:
AS
Naval Air Systems Command
Amendments to military specifications or specification sheets issued after August 1, 2003 are incorporated in the modified document.
Revision History
Click on column headings for a description of column content.
Media
Document Part Description
Dist Stmt
Document Date
Pages
Size
Notice 1 - Cancellation
A
08-JUL-1988
1
15.7 KB
Amendment 3
A
14-OCT-1964
2
59.7 KB
Base Document
A
01-JUL-1958
6
356.3 KB
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Defense Standardization Program
WARNING: UNAUTHORIZED ACCESS TO THIS UNITED STATES GOVERNMENT COMPUTER SYSTEM AND SOFTWARE IS PROHIBITED BY PUBLIC LAW 99-474 (THE COMPUTER FRAUD AND ABUSE ACT OF 1986) AND CAN RESULT IN ADMINISTRATIVE, DISCIPLINARY OR CRIMINAL PROCEEDINGS.