Your first question is an easy answer. The BIG yellow dots are 8" guns, only available on the cruiser. The medium-sized dots are 5" guns, available on both the cruiser and carrier. The smaller dots on the carrier are 40mm guns (between the 5" turrets near the tower), BUT on the other ships they are 20mm cannons.
I use 5" AA shells for nailing everything because they blow if you get remotely close to your target. You might get lucky and nail the sucker out-right too. If another fleet shows up, jump over to the cruiser's 8" guns and bang away!
No, there's no place to show you what gun is what caliber. As for the PT Boat, here's what I know:
#1: Twin 50 cals
#2: Twin 50 cals
#3: Single 20mm (bow mount)
#4: Single 37mm (bow mount)
#5: Single 40mm (fan tail mount)
#6: 5" rocket launcher
Torps are fired from the driver's seat, just in case you didn't know.
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Flakbait [Delta6]
Delta Six's Flight SchoolPut the P-61B in Aces High"For yay did the sky darken, and split open and spew forth fire, and
through the smoke rode the Four Wurgers of the Apocalypse.
And on their canopies was tattooed the number of the Beast, and the
number was 190." Jedi, Verse Five, Capter Two, The Book of Dweeb