Baffin Island Canada unidentified aerial event — November 1958

It appears to be a text-based report describing a visual sighting of an unidentified flying object. 3 SECONDS B. (C) AIR VISUAL SIGHTING C. (C) SIGHTED BY OPOF, DC3 10,000 FT 210 HEADING, 140 KNOT SPEED BASE OF OPERATIONS, FROBISHER. THIS A/C INCIDENT REPORTED COMPLETELY TO SEARCH MASTER. IF POSSIBLE, REQUEST FURTHER INFO ON SIZE, COLOR, TAIL OR TRAIL, ANGLE OR ELEVATION AND AZIMUTH OF OBJECT WHEN OBSERVED, AND DIRECTION OF MOVEMENT.