As far as I am quite sure, there were definitely ships... and paddle boats.
Lanteen sails
Compass, sextant (or astrolabe), & timepieces.
Wind power
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He used a Viking merchant ship known as a knarr.
That means there are many different types of kites.
large boats?
Narrow boats.
Most of the boats on the Thames are tourist and pleasure boats and there are very few goods carrying boats left.
a Lateen Sail
could a grant apply to liveaboard boats?