 Airships are a common mode of transportation for those who have dealings between Rephidim and the lands of Sinai below. Their forms vary greatly, but the typical structure is that of a gondola -- sometimes seaworthy -- suspended underneath a huge bag containing lighter-than-air gases such as hydrogen or helium. Some sport large sails to better catch the wind, though these are most often found on airships with on-board wizards of the Sphere of Air, for whom such sails may perhaps have more than purely mechanical importance. Since the advent of the discovery of the Gateway Tower and trade with Abaddon, many airships have been replaced with semi-mechanical zeppelins, relying on complex propulsion systems. Although zeppelins on Abaddon move primarily with spinning propellers, Sinaian designs employ flapping wings, pumping bellows, and all sorts of seemingly unnecessary moving parts - which engineers insist are crucial to the functioning of such craft on Sinai.
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