Marine vessel for transporting compressed gas, comprising a plurality of cylinders for containing compressed gas grouped into single multiple containment units, wherein at least some of said units are multiple containment units of compressed gas cylinders, each comprising: - a support frame comprising in turn a support base and a plurality of side containment structures which are structurally connected to the support base and extend vertically therefrom defining an inner containment volume; and - a plurality of cylinders for containing compressed gas which are connected to said support frame in order to maintain a stable position therein, said cylinders being arranged vertically along their longitudinal extension axis inside the containment volume defined by the support frame, wherein the support base of the support frame has a plurality of support feet designed to be rigidly anchored to a portion of a means of transport, wherein in each of said multiple containment units of compressed gas cylinders the support base of the support frame is connected to each of said support feet by means of an elastic joint, the set of elastic joints creating a discontinuity in the transmission of stresses and of deformations between the support feet and the support base, said elastic joints being sized to allow relative movements between the feet and the support base on a plane parallel to said base, dampening shifts orthogonal to said plane, characterised in that each cylinder is connected to the support base by means of a lower connection device comprising: - a support element at which the cylinder abuts with a longitudinal bottom end, and - a spherical joint which constrains said support element to the support base, allowing the free rotation of said support element and of the cylinder resting on it with respect to the support base, but preventing translations thereof with respect to said support base, and in that the multiple containment unit comprises a vertical support structure of the cylinders which is constrained to the side structures of the frame at a predetermined height from the support base and which defines for each individual cylinder a vertical positioning seat, each cylinder being free to translate axially within its respective seat with respect to said vertical support structure, which accompanies the cylinders in the movements of the side structures of the frame, following the rotations of each cylinder permitted by the respective lower connecting device without transmitting to them bending and/or twisting moments and while keeping the cylinders separate from each other according to a predetermined positioning plan view layout. - a support frame comprising in turn a support base and a plurality of side containment structures which are structurally connected to the support base and extend vertically therefrom defining an inner containment volume; and - a plurality of cylinders for containing compressed gas which are connected to said support frame in order to maintain a stable position therein, said cylinders being arranged vertically along their longitudinal extension axis inside the containment volume defined by the support frame, - a support element at which the cylinder abuts with a longitudinal bottom end, and - a spherical joint which constrains said support element to the support base, allowing the free rotation of said support element and of the cylinder resting on it with respect to the support base, but preventing translations thereof with respect to said support base,