JANAP 146(D) — Canadian-United States Communications Instructions for Reporting Vital Intelligence Sightings (CIRVIS / MERINT)
JANAP 146(D) provides the official communication protocols for reporting vital intelligence sightings (CIRVIS/MERINT) between the US and Canada. It also contains a 1961 briefing on Project Blue Book, noting that 8.54% of 6,790 UFO reports collected between 1947 and 1960 remained unidentified.