flyboat

noun2

1. •
   (UK, Ireland) A kind of (often horse-drawn) passenger boat formerly used on canals. Faster than other types of canal boats at the time, the horses would run along the towpath
2. •
   (historical) A large flat-bottomed coasting vessel, formerly found in Holland, Spain and Portugal.

   • August 14, 1595, Thomas Treffry, letter to Sir Robert Cecil a ship of Bristol was chased into this harbour by two Spanish fly-boats, and they report […] that there are five men of war, Spanish, in the road of Conquet