Marine surface vessel

1. A marine passenger vessel extending in a longitudinal direction between a bow and a stern, comprising:

least one power providing apparatus operatively connected to at least one propulsion unit for propulsion of the vessel,

a fuel tank arrangement for storing gaseous fuel in a liquid phase, connected to the power providing apparatus by means of a gas supply system for running the power providing apparatus, and

a plurality of decks distributed vertically, one above the other, the fuel tank arrangement comprising two tank sub-arrangements, each tank sub-arrangement comprising at least one gaseous fuel tank, each fuel tank extending vertically past at least two of the decks, and at least two of the decks, past which the fuel tanks extend, each presenting a passageway,

wherein each of said passageways extends in the longitudinal direction of the vessel, from a portion of the respective deck aft of the tank sub-arrangements to a portion of the respective deck forward of the tank sub-arrangements,

wherein each passageway extends between the tank sub-arrangements, there being one, two, three or more tank sub-arrangements on each side of the passageways,

wherein each of said passageways is adapted so as to provide for persons and/or items to move or be moved through the respective passageway, the passageway being provided as a corridor between the tank sub-arrangements, and being of a width and height which makes it suitable for movement of passengers through the passageway.

2. The vessel according to claim 1 , wherein each of said passageways extends in the longitudinal direction of the vessel, and is located centrally in a lateral and horizontal direction of the vessel.

3. The vessel according to claim 1 , wherein at least one of the at least two the decks presenting a passageway extending between the tank sub-arrangements, presents a plurality of cabins distributed on both sides of the passageway, at least some of the cabins extending from the passageway to a respective side of the vessel.

4. The vessel according to claim 1 , wherein each tank sub-arrangement comprises at least two fuel tanks distributed in the longitudinal direction of the vessel.

5. The vessel according to claim 1 , wherein the tank sub-arrangements are at the same longitudinal position in the vessel.

6. The vessel according to claim 1 , wherein each tank sub-arrangement has a vertical extension which is larger than any of its horizontal extensions.

7. The vessel according to claim 1 , presenting a hull and a superstructure above the hull, wherein a lower portion of each fuel tank is located in the hull, and an upper portion of each fuel tank is located in the superstructure.

8. The vessel according to claim 1 , wherein the tank sub-arrangements are located adjacent said passageways.

9. The vessel according to claim 1 , wherein the tank sub-arrangements are located in respective tank compartments, each extending to a respective side of the vessel.

10. The vessel according to claim 1 , wherein the distance between any of the at least one fuel tank of each tank sub-arrangement and a respective side of the vessel is at least 20% of the beam of the vessel.

11. The vessel according to claim 1 , comprising two exhaust guiding arrangements provided for guiding exhaust gases from the at least one power providing apparatus to the exterior of the vessel, each exhaust guiding arrangement being located in a respective exhaust pipe casing.

12. The vessel according to claim 11 , wherein the exhaust pipe casings extend vertically past at least two of the decks past which the fuel tanks extend.

13. The vessel according to claim 11 , wherein the exhaust pipe casings are distributed on opposite sides of said passageways.

14. The vessel according to claim 11 , wherein the exhaust pipe casings extend adjacent to said passageways.

15. The vessel according to claim 11 , wherein each tank sub-arrangement is located adjacent a respective of the exhaust pipe casings.

16. The vessel according to claim 11 , wherein the tank sub-arrangements are located, in the longitudinal direction of the vessel, between the exhaust pipe casings and the bow.

17. The vessel according to claim 11 , wherein the exhaust pipe casings are distributed at a distance from each other in the longitudinal direction of the vessel, and the tank sub-arrangements are located, in the longitudinal direction of the vessel, between the exhaust pipe casings.