The Astral Empire: Travel (part 3)

Not all astral skiffs are the tiny 8-square things described on p. 159 of the 4e MotP. Many larger vessels exist, although they are also generally slower and/or less maneuverable. (Many of the vehicles in Adventurer's Vault (pp. 18-19) are suitable; I suggest especially the chariots and greatship. DMs are also encouraged to find more interesting and/or flavorful names than skiff; I suggest cruisette, cutter, dory, fifie, flivver, junk, pirogue, schooner, trimaran, umiak, and vedette as starting points.) These are commonly used by merchants, and armed versions make up the bulk of the Navy.

Spelljammers, being expensive and powerful, are rare and restricted; legally they only exist as military vessels. Since the primary cost of the spelljammer is the helm, many of the Navy's spelljammers are carrier spelljammers (casobiac), which may transport up to 50 standard-sized astral gunboats (as skiffs, with armaments) or 100 lighter and smaller single-person aeolopters. As spelljammers, unlike skiffs, can enter dadh, carriers also (if rarely) see use bearing flotillas of airships into combat within a crystal sphere. The Navy also has a small number of dreadnought spelljammers in service.

Planar dromonds are completely unknown. This does not necessarily imply that they do not exist.