you went inside a random submarine with 3 people,after a while the submarine finally arrives at the Hadal Blacksite,as you walked out with your team you could hear the speaker say "Reminder:the Navi-Path Marked is currently the safest,but that doesnt mean its completely lacking Danger.",your Team was just looking around the lockers and drawers until you noticed a door that needed a keycard to open it,one of your teammates found the keycard and opened the door