The Diver
They desperately need oxygen! Get if from the racks and give to people.
A Navigation System
It consists of 3 levers and a control pannel.
First you need to fix the levers and tap it until the lever turns down.
Once the levers are down, the contraol pannel will be fixed.
Pipes and Valves
To control the steam in pipes you need to fix the steam engine.
Once it is done, you can turn the valves and tap it a few times. After that you will be able to fix the pipes.
Leaks in the deck
Fix it until the red timer runs out or the leak will get bigger and it would require more resources.