The national museum had a joint project with the army. The radars showed a sunken ship on the bottom of the ocean. According to the records, it was supposed to be the lost gold shipment. We've thought it was stolen by the pirates, but it seems it ran into a storm. They provided a submarine for the excavation of the crates. Unfortunately, the submarine was an older modell and malfunctioned. You were in the robot, checking out the wreckage, when you saw the submarine going down. Let's see how you can help and return to the surface. Good luck and be careful!
Walkthrough for Mystical Submarine Treasure Adventure