Argent four aircraft propeller blades in cross azure the lower one resting on a base barry wavy of four azure and argent, over all a saltire couped at the ends fess-wise to represent the letter X gules, in the center of which a small cog-wheel or.
(Glossary of Heraldic Terms)
As this was the experimental air squadron, the X is a rebus on the nature of their operations. The lower propeller blade resting on the heraldic water reinforces the bond between the Navy and the Air arm. The small cog in the very center of the design may have alluded to the fact the squadron was able to keep the wheels of the service turning.
It was formed in March 1953 to test all new aircraft and equipment which entered service with the Navy. The unit is no longer in service.
Superbia in progressum
Red and white
Badges Of The Canadian Navy by Arbuckle, J. Graeme. Halifax: Nimbus Publishing, 1987.