1. Take gas bottle from ceiling
2. Take ring from poster on wall on red dot
3. Go right - open toilet and take knife from toilet paper
4. Use knife on toilet tube and take tube
5. Use knife on red ring and cut into two parts
6. Go left and click on floor left front take wrench and remove the 4 screws with wrench - open and take gas mask
7. Combine tube with the 2 red parts, then the tube with the gas bottle and then the gas bottle with the gas mask
8. Click on red dot und go inside the torpedo room (quickly)
9. You're out.