Lattice structure, use of the lattice structure and a vessel with such lattice structure

A lattice structure (1) is described for the passage of a first medium against a second medium with transverse webs (20) and longitudinal webs (10), lattice openings (4) with a clear width of ≤ 300 m being arranged between the transverse webs (20) and the longitudinal webs (10). On at least one side (2, 3) of the lattice structure (1), the transverse webs (20) and/or the longitudinal webs (10) have a rib arrangement (8, 8a, 8b) of ribs (31, 32, 41, 42) projecting vertically to the lattice plane (6), at least one first group (30) and a second group (40) of ribs (31, 32, 41, 42) being arranged which differ from one another at least by their heights H1, H2 with H1 > H2. A vessel (50) is also described with at least one water inlet window (54) and an air outlet window (55), both windows being provided with the lattice structures (1).