Anti-sloshing device in moon-pool

An anti-sloshing moon pool structure, comprising:

• a plurality of moon pool plates (112, 114, 116, 212, 214, 216) perpendicularly provided on a bow-side wall (401), a stern-side wall (403) and opposite sidewalls (405) of inner walls of a moon pool (100);
• and
• a moon pool bottom block (130) provided on a bow-side lower edge (407) of the inner walls of the moon pool (100) in a direction oriented toward a center of the moon pool (100), wherein
• the moon pool plates and the moon pool bottom block (130) have protruding lengths within which the moon pool plates and the moon pool bottom block do not interfere with a maximum working area,
• a plurality of upper steps (112a, 112b, 114a, 114b, 116a, 116a-1, 116b and 116b-1) of the moon pool plates is disposed such that, when a ship is in a working position, the plurality of upper steps is lower than a free surface of seawater, and a plurality of lower steps (112c, 112d, 116c and 116d) of the moon pool plates is disposed such that, when the ship runs, the plurality of lower steps is lower than the free surface of the seawater.