deckless

Brim nodded grimly while the skimmer careened giddily across a deckless repulsion bridge.

This long, narrow, deckless craft was the first of its kind that I had ever seen, though I had heard so many stories that I had no trouble recognizing the type.

These were of the sleek Athenian aphract (deckless) design, originally developed by Themistocles primarily for ramming actions, although they had been modified by Cimon to improve their suitability for boarding actions.