I did an equation and the 5.3 duals, Level 48 are 50% less powerful than pom poms. based on Reload, barrels, and damage per AA shell, but Range is better on the 5.3s .. time to have a test of this. :P
Reload of Pom Pom. : 440% of RP10
Damage per shell: 13% of RP10
7 barrels vs 2: 350%
Pom Poms are twice as powerful... but the golden angle is 51...
RP10s golden angle is 36 so they are more effective, but they aren't as powerful...
Conclusion, don't use UK for an AA ship... lol