A deck arrangement for a vessel or platform (1) configured for performing subsea operations, the vessel or platform having a main deck (2) and a working station (4a) and facilities (9b, 6; 28) for supporting activities in the working station, the working station further comprising a working area (4b). One or more deck elements (14a,b, 15) are arranged at an elevation different from than of the main deck (2) and at an elevation where upper surfaces of the deck elements (14a,b, 15) and the upper surface of the working area (4b) are on the same, or substantially same, level. Preferably, the deck elements are arranged above the main deck (2) and above one or more of the facilities (9b, 6, 28). The facilities may be a riser storage compartment, a BOP area and/or a pipe deck.