Transportation – Watercraft or hull – Longitudinal planing steps or strakes on bottom
patent: 4903626 (1990-02-01), Haines
patent: 5111767 (1992-05-01), Haines
1993 Tigershark Hull by Arctco, bottom view.
1993-94 SL650 Hull by Polaris, bottom view.
Rauch Robert J.
Rolland Chad M.
Chin Kay H.
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