When closed up at action, any war canoe will have (NBCD etc allowing) upperdeck gun crews closed up on 20mm and GPMG. Phalanx/Goalkeeper will be set to AAW Auto if required. To be fair...Phalanx VS Sunburn is still going to be bad day out...a few tons of burning, bus sized weapon coming your way at Mach several will part your hair. Phalanx just divides it neatly into chunks first.