Inflatable boat having a detachable rigid hull

1. An inflatable boat comprising:

two side buoyancy tubes;

a floor having an underside that is rigid at least transversely and that is interposed between said tubes;

a flexible bottom sheet that covers the underside of the rigid floor and that is secured in watertight manner to said tubes; and

a hull of approximately V-shaped cross-section disposed under the flexible bottom sheet, which hull comprises at least a central longitudinal strip in the shape of a V-shaped trough that is rigid, and that is made up of a plurality of longitudinal segments assembled together end-to-end, and secured together by releasable fixing means, each segment having abutting ends, top ends, and a tip portion defining the V-shape;

wherein said releasable fixing means for releasably fixing together two consecutive hull segments comprise:

at each side top end, at least one longitudinally-extending projecting finger on an abutting end of one segment and at least one respective facing longitudinal recess provided in an abutting end of an adjacent segment and suitable for receiving said projecting finger; and

in the tip portion of the V-shape and inside the hull, at least one connection member on an end of one segment, and at least one corresponding connection member situated inside the adjacent segment, and a retaining pin suitable for being engaged through the connection members.

2. A boat according to claim 1 , wherein one of the segments is provided with an opening near the connection member of that segment, which opening is provided with a hatch that can be operated from the outside.

3. A boat according to claim 1 , comprising one or more intermediate segments, a stern segment and a bow segment having an aft, wherein a substantially triangular respective transverse plate is provided at each end of each of the intermediate and stern segments, and at the aft end of the bow segment.

4. A boat according to claim 3 , wherein each plate is perforated.

5. A boat according to claim 1 , wherein each hull segment is made of metal.

6. A boat according to claim 5 , wherein each hull segment is made of aluminum alloy.

7. A boat according to claim 1 , wherein each hull segment is made of a composite material.

8. A boat according to claim 1 , wherein each top end of each hull segment is provided with two mutually-parallel grooves suitable for receiving a pair of fixing bolt ropes secured to or integral with said flexible bottom sheet.

9. A boat according to claim 1 , wherein the rigid floor is made up of a plurality of segments assembled together end-to-end in detachable manner, each floor segment having side edges that are raised so that the floor segment has a cross-section which is approximately V-shaped with a truncated tip, and in which the inclination of the raised side edges is approximately the same as the inclination of the V-shape formed by each hull segment;

wherein the flexible bottom sheet fits snugly over the rigid floor, the flexible sheet having pairs of bolt ropes extending substantially along the V-shape formed by the raised side edges of the floor segments;

and wherein the rigid hull is mounted on said pairs of bolt ropes and extends, downwardly, approximately in alignment with the raised side edges of the rigid floor.

10. A boat according to claim 1 , wherein the rigid hull comprises a bow segment with a forward end and a stern segment with an aft end, wherein the flexible bottom sheet has a forward end with a flap suitable for being folded and strapped over the forward end of the bow segment of the rigid hull, and wherein retaining means are provided at the aft end of the stern segment, for locking the rigid hull longitudinally.

11. A boat according to claim 10 , wherein the retaining means have straps.

12. A boat according to claim 1 , wherein the central rigid strip of the hull is constituted by two to four segments.