Ships are screened against teleportation magic by default, but some captains choose to add in special (and often well guarded) chambers which can allow these spells to get through. This spell is particularly adept at locating these chambers and teleporting the caster to them. In general, the range is quite limited; however, if the caster is in one of the teleportation rooms to begin with, the chamber will boost the power of the spell, sending him over much greater distances. Alternatively, if not in such a chamber, the caster may dump extra energy into the spell directly, and extend its range somewhat.