Wiktionary
johnboat
alt. a flat-bottomed boat with a very shallow draft, whose bow and stern are both squared off n. a flat-bottomed boat with a very shallow draft, whose bow and stern are both squared off
Usage examples of "johnboat".
During a flounder gigging trip on a moonless night, he had tried to use the harpoon to gig the flounder exposed in the soft mud flats and sandbars by the light of a lantern on a johnboat.
I stow Jimmy Stoma's hard drive, the compact discs and the Lady Colt in the waterproof tote before loading it with the rest of the gear on the johnboat.