🇺🇸 USAF — Project Blue Book
In February 1955, a contrail sighting was recorded at the remote Alert station on Ellesmere Island. Three RCAF weather observers simultaneously saw a narrow, dense line moving from southwest to northeast. The estimated altitude was between 5,000 and 6,000 feet, and it disappeared within 15 to 20 minutes. Although an aircraft was considered, no correlation with known traffic was found, leaving the nature of the object uncertain.
The report classified the sighting as possibly a contrail formed by an aircraft of unknown nationality. Given the remote location and lack of additional data, the most plausible explanation was a contrail, though other possibilities were not ruled out. This case, like many from the 1950s, reflects the uncertainty surrounding unexplained sightings of that era.