The Submarine is a new underwater vehicle in ATLAS added in the Update v1.5/v100.1
Explore the depths of the ocean in this small scouting submarine. Use the claw arms to help harvest the ocean floor and explore (demolish) shipwrecks. Also equipped with a harpoon (uses Ballista Bolt ammunition) as a new underwater weapon which will ramp up oceanic combat.
Base gems, crystal & alloy cannot be used for crafting a Submarine, but can be used for repairs.
After building the submarine, it will appear in the Dinghy Ship Hangar of your ship.
It can be released by standing on it and holding e to release it, this will then drop it into the water, this can also be repeated to re-dock it back into the submarine if close enough.
you can enter it by swimming next to it and pressing e to board.
The Submarine has 18 inventory slots for storing gathered resources/ammunition
Sit in the driver's seat by pressing e, and then you can steer using the mouse
d Key is surface, a Key to descend while w Key is forward and s Key is reverse.
Left or Right Mouse to use the claws or Middle to fire Ballista Bolt. The claws perform a basic melee attack and can be used to kill, for example, Squids or take a Giant Crab down to low enough health to tame. As using claws puts the submarine in melee range of the creature it is likely that your submarine will take a bit of damage from this, this should not trouble a full health submarine. The claws are able to farm the ocean floor as well, very useful in the Trench where most coral / shell objects return valuable resources.
A gauge for how much Mythos is required to fuel a submarine is approximately 1 Mythos per 45 seconds of the motor engine being operational. It doesn't appear to use much or any Mythos when the submarine is stationary (requires confirmation). As the Trenches are not that big, 50-100 Mythos put in the Dinghy Ship Hangar should be more than enough to explore one Trench completely.
New Vehicle: Submarine. Explore the depths of the ocean in this small scouting submarine. Use the claw arms to help harvest the ocean floor and explore (demolish) player shipwrecks. Also equipped with a harpoon (uses ballista bolts) as a new underwater weapon which will ramp up oceanic combat.