JANAP 146 — the US military UAP reporting regulation that operated alongside Blue Book

Joint Army-Navy-Air Force Publication 146 — universally known in the historical literature as JANAP 146 — was a US military communications regulation governing the reporting by military pilots and ships' captains of unidentified aerial and surface phenomena observed during operational activity. The regulation, issued in its first version in 1948 and revised across multiple subsequent editions through the 1950s and 1960s, established a parallel and substantially more secret reporting channel for military UAP observations than the public-facing Project Blue Book intake process — a structural distinction whose implications shape the entire historical record.

What JANAP 146 required

JANAP 146 designated certain categories of unidentified observations — including airborne objects exhibiting unusual flight characteristics, surface objects of unknown origin, and electromagnetic phenomena inconsistent with known sources — as "CIRVIS" (Communication Instructions for Reporting Vital Intelligence Sightings). CIRVIS reports were to be transmitted by military observers through dedicated communication channels directly to designated US air-defence and naval-intelligence recipients, with priority handling and with substantial classification restrictions on subsequent discussion or release.

Crucially, the regulation made the unauthorised disclosure of the contents of a CIRVIS report — including to the press or to civilian researchers — a punishable offence under the Espionage Act for serving military personnel. This created a substantial structural asymmetry: military observers were both required to report UAP observations through formal channels and constrained from discussing those observations through any other channel.

How JANAP 146 interacted with Blue Book

Project Blue Book's public role was to investigate UAP cases reported through ordinary channels by both military and civilian observers. JANAP 146's parallel role was to ensure that the most operationally significant military UAP observations were captured through a dedicated intelligence channel which was not necessarily linked to Blue Book's analytical workflow.

The practical result was that some of the most evidentially substantive military UAP cases of the Blue Book era — particularly cases involving advanced sensor data, classified facilities, or sensitive operational contexts — were filed and held in JANAP 146 channels rather than appearing in the Blue Book case files that were eventually declassified and released to the public. This is one of the principal structural reasons why the publicly available Blue Book record is widely considered to be a partial rather than complete representation of historical US military UAP observations.

The framework's continuing relevance

JANAP 146 was succeeded across subsequent decades by other military reporting frameworks, and the contemporary equivalent — embodied in part by the various intelligence and air-defence reporting requirements that feed into AARO's casework today — operates on substantially similar structural principles. Understanding JANAP 146 is therefore essential to understanding why the historical military UAP record is institutionally fragmented and why even systematic public-record reviews necessarily produce only a partial picture of what military observers have actually reported. For comparison with contemporary AARO and AATIP-era frameworks, see the SkyLens UAP archive.

Editorial note: Independent SkyLens analysis of a Project Blue Book-era US Air Force UAP case or institutional process. The full Blue Book case index and related releases are catalogued on the SkyLens UAP files page.