What are the differences between drop stitch air and plywood floors? once inflated, a high pressure air floor becomes as rigid as a. A kayak is a small, narrow watercraft which is propelled by means of a double-bladed paddle. the word kayak originates from the greenlandic language, where it is the. Proas, prahus, similar craft faq ===== version 1.7 december 18 1996. by: craig o’donnell contact me with comments or additions..