Submachine manta unit 33

For ArtStation Challenges,
Beneath the Waves : Prop Design 2017
Story:
Year 2393, the mother ship "Knife" left Earth, heading to saturn's moon, enceladus.
Its mission : to find life on Saturn moon's Enceladus
Once the "Knife" reaches its destination, it will have to break ice on the moon's surface. Then, it will dive into the water for finally settle the bottom of the ocean.
the Explorers will use fast submarine for long distance. Sentinels will wear helmets generating oxygen and helped by their drones.