Titanic sightseeing submersible ruptured at a depth of 3,300m.jpg

(1)a white hull that is hard to see under the sea
(2)2 Not hatch type, but pipe type that is bolted from the outside to close the door
(3)3 Safety regulations are mostly unnecessary, and safety measures are considered
(4)4 Extreme cost savings with no minimum safeguards or contingency plans

(1)The sound that was heard every half hour is the sound that the passengers made
(2)The sound was the last one. There was no sound
(3)It survived for several hours, but eventually ruptured at a depth of 3,300 meters
(4)If you look at the CEO’s old video, there’s a part that explains that the submersible is transformed by water pressure, but it’s okay because it can be known by sound before something big happens;
(5)Fortunately, he died before he felt the pain because it took only two nanoseconds for the hull to burst and die