We claim the ornamental design for an inflatable shuttle boat, as shown and described.
FIG. 1 is a perspective view of an inflatable shuttle boat.
FIG. 2 is a top planar view of the inflatable shuttle boat depicted in FIG. 1.
FIG. 3 is a side planar view of the inflatable shuttle boat depicted in FIG. 1.
FIG. 4 is a bottom planar view of the inflatable shuttle boat depicted in FIG. 1.
FIG. 5 is an aft end planar view of the inflatable shuttle boat depicted in FIG. 1; and,
FIG. 6 is a bow end planar view of the inflatable shuttle boat depicted in FIG. 1.
The broken lines in the drawings illustrate portions of the inflatable shuttle boat that form no part of the claimed design and may depict environmental subject matter only.