Directives for Observation and Reporting of Light Phenomena

This document, issued by the Swedish Defense Staff (Försvarsstaben) under the authority of C. A. Ehrensvärd, outlines formal procedures for the observation and reporting of 'light phenomena' observed over Swedish territory. The directive notes that these phenomena have been observed in recent months and suggests they may be related to experiments with remote-controlled weapons. The document specifically references the 1946 Air Force exercises as an opportunity to monitor these occurrences without interference. The directive mandates that observation and reporting services be maintained around the clock by military units (lbev-förbanden) as resources permit. It provides detailed instructions for reporting, including the need to record the exact time, duration, direction (using elevation instruments), and course of the phenomena. Observers are instructed to note if the movement is straight or zig-zag (curved), and to describe the appearance, color, and whether the light or smoke trail appears steady or intermittent. Sound phenomena, such as noise, bangs, or hissing, must also be documented with the time elapsed between the visual sighting and the auditory perception. Furthermore, the document instructs that activities should be directed toward determining the altitude, speed, and course of the objects. Finally, it orders that fighter units be kept in readiness to intervene against potential rocket projectiles, and that reports be submitted by exercise leadership to the Chief of the Defense Staff.