I was quite interested in submarines recently, so I re-wathed my ROTF DVDs at home. After Megatron was revived from occean floor, a U.S. submarine detected them (including a decepticon medic and 4-6 constructicons). The team members then accellerated and smashed into the submarine. The impact caused the Sub a whale-flip before its destruction. Now I wonder how big that submarine is. A bigger Sub displaces 4500-ton. And a smaller one displaces 1500-ton.