After you enter the new location, you will find yourself in the zone named the Gun Shop where you will be attacked straight away by Penguin's henchmen. As you have probably noticed, the enemies use knives so, you need to avoid their attacks. The best method to do that is to lean the analog stick down and press the counter-attack key/button (the screenshot). Optionally, you can also try to jump over them, stun them with your cape and use some of Batman's offensive gadgets.
After you are done, open the Northern gate and start your exploration of the ship, to reach the area where you will have to put up a fight again. In this case, the most serious threat comes from the enemies armed with guns. Try to attack them in the first place, while performing numerous dodges.
Another important matter is to prevent the enemies from grabbing their own guns. Therefore, you should be stopping the ones that try to collect the weapons from the ground, as well as those that want to collect them from the crates. In the latter case, each time alarm is raised and red lights turn on so, you should not have to many problems with recognizing the moments at which you should attack the person that poses a threat. Apart from the matters described above, you should also mind the enemies tossing crates at Batman from above. Destroy the crates with batarangs or perform dodges.
Open the Northern hatch and go ahead to reach Deck 1 after several moments. After you reach a fork, do not attempt to jump into water and take another way round to the destination, and take leaps towards the small ledges along your way, and walk over the small fragment of the structure. After you come close to another group of gangsters, glide towards the first one of them and deal with the remaining ones, who will pose no major threat anymore (you only need to watch out for the big elements thrown at Batman).
After the victorious fight, stop at the edge, select the claw from the inventory and aim at the catches of the floating platform shown in the above screenshot. Start tapping rhythmically the key/button shown by the game to pull the platform. Then, jump onto it.
You still need to keep using the claw but, from now on you will be interested in pulling yourself towards the catches that you can see in the distance, to set the platform into motion and make it over to the other end of the water reservoir. Finally, aim at the point under the small balcony. This will make some of the structure collapse, which will reveal a ledge which you can reach using the hook.
Resume your exploration to reach the door to the Boiler Deck. The attempt to open the door at the edge of the large arena will fail so, after you listen to Penguin's speech, go right. Wait for the steam to stop coming out of the openings and walk ahead only after that, thanks to which you will avoid being burned.
[New Character Profile: Penguin]
Look up and use the hook to grapple onto the ledge above. Soon, you will reach a new area with steam coming out. wait until it stops escaping from the nearest pipes and dash ahead, trying to coordinate everything perfectly. Use the hook again and, after you reach a new are, change it for the claw, to open the nearby hatch with it. Follow the short tunnel to the very end and jump down to the arena, which will result in the playing of a cutscene with Tracey and Electrocutioner starring.