The story has a lot of inconsistencies. First, there's the "tugboat oil tanker" - that doesn't exist. It's either an oil tanker ship or a tugboat, which are two different types of vessels. Second, what is an "air pocket"? There's no such equipment on board that lasts for 52 hours. The only similar safety equipment is the EEBD (Emergency Escape Breathing Device), used in confined spaces in case of a fire in the engine room, providing 15 minutes of air to escape.
These details clash with the experience of a merchant mariner and make the story lose realism. In any situation endangering lives at sea, there are established procedures continuously practiced to prevent loss of life. In this case, it would be abandoning the ship, most likely because it's sinking, although you don't specify what happened. While these details might be skipped to add action and drama, there are standard procedures for abandoning the vessel using lifeboats or life rafts.
I hope this feedback helps improve your story. Greetings!
Thank you @ricardo993 . I'll improve my writinh next time