What other weapons besides the QF 2-pounder naval gun, so named because of the sound it made when fired, were there on the HMS Foylebank?
HMS Foylebank:  She was converted into an anti-aircraft ship, equipped with 0.5 inch (12.7 mm) machine guns, two quad 2-pounder pom-poms and four twin high angle 4-inch gun turrets.
i don't know