The Penguin's submarine can borrow torpedoes from the purple torpedo
dispenser. Now armed with torpedoes, target the security turrets
guarding the gates and gun it down. Head through the opened gate and
sink the turret in front of the other gate. Before heading through,
however, there are a few LEGO canisters to collect around here.
First, launch a torpedo at the object drifting amongst the green sludge
in the corner. Located around this area are three orange silo things;
shoot them up to gain this canister.

Speed toward the purple gate in the back and submerge the submarine
to dive under and past the gate. Hit the red switch first as the
submarine, then switch to the croc's boat to hit the other one among
the toxic sludge. Load up a few torpedoes and aim for the three yellow
canisters lodged in the polluted water. Use the croc's swift boat to
leap off of the ramp and catch some serious air as well as the LEGO canister. As well, blow up all the docked ships in search of the LEGO canister in the corner. Afterwards, remove all of the polluted water to reach the two turrets guarding the gate.

Access the other torpedo dispenser here to demolish the turrets and move on. Head into the small patch of toxic waste for a LEGO canister.
Hit the red switches on either side to slide open the gates. Deliver
torpedoes to each of three turrets to move forward. Be sure to hit all
five of the buoys located around this area for a LEGO canister.

Going into the next area pits you against a police hovercraft that's fully decked out and supported by dozens and dozens of annoying
boat peons. Slap the red switch in the back left corner to open access
to the torpedo dispenser in the back. Hit the yellow objects in the
toxic waste with torpedoes and dive near the docks to add another LEGO canister
to your collection. Gather up more torpedo firepower and proceed to hit
all the targets on the boat until a spotlight appears. Run through the
spotlight to tag a target reticule onto your own boat, but sail to the
big hovercraft. Luckily, the disabled friendly fire works to your
advantage, and the enemy missiles will end up hitting their own people.

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