Patent ID: 7963240

Claim:
A catamaran adapted for high speed travel, comprising: a first vaka; a second vaka disposed parallel to said first vaka in transversely spaced apart relation thereto; an aka that interconnects said first and second vakas to one another; a first air tube of elongate extent formed in said first vaka on an interior side thereof; a second air tube of elongate extent formed in said second vaka on an interior side thereof in transversely spaced apart relation from said first air tube; said first air tube being in open communication with a leading end of said first vaka; said second air tube being in open communication with a leading end of said second vaka; said first air tube having a predetermined uniform depth from said leading end of said first vaka to a point that is approximately where said catamaran has a center of gravity; said first air tube gradually lessening in depth at a predetermined rate as measured in a direction from said approximate center of gravity to said stern, said predetermined rate causing said first air tube to have no depth when it merges with an inner sidewall of said first vaka at a location between said stern and rearward of said center of gravity; said second air tube having a predetermined uniform depth from said leading end of said second vaka to a point that is approximately where said catamaran has a center of gravity; and said second air tube gradually lessening in depth at a predetermined rate as measured in a direction from said approximate center of gravity to said stern, said predetermined rate causing said second air tube to have no depth when it merges with an inner sidewall of said second vaka at a location between said stern and rearward of said center of gravity.