Ack Ack in the sky
“Ack Ack in the sky: When Japanese bombers attempted to sneak in on Cape Gloucester under cover of darkness, Marine units there sent up this concentration of ack-ack tracer fire. It makes very pretty pattern picture but the Japanese didn’t appreciate it and they abandoned the attack.”
USMC Photo 127-GR-87 by Sgt. George Sylvester
How long could that rate of ACK ACK be sustained?