The killer whale is on the home page of the arms tycoon website. Players who log in for the first time after the update will find that it is actually locked, and they need to meet Migaia Madraso (aka "Little Martin") before they can purchase it.

1. The picture below is an open music cabinet. Enter from the side door. If you already have a penthouse, you can enter for free; if not, you have to pay an entrance fee.

2. Then Martin will tell you a lot about their suppliers, and then let you take advantage of them.

3. Little Martin’s mother, the old lady who Trevor likes very much, will also appear, but she won’t talk much. Once the meeting is complete, the submarine can be purchased.

4. After purchasing, you can call out the submarine at the vehicle asset, because the submarine is large and will not be generated offshore. You can choose to call a special vehicle in the moon pool, or send a small boat to pick you up.

5. Press the E key to enter the killer whale submarine. There are three entrances to the submarine, two of which are very close to the control room; the entrance at the rear can enter the shipping section.