Helmsman

This spell summons a disembodied force (like an unseen servant) that maintains a sailing ship on a preset course. If any navigation checks are required, the helmsman uses the Intelligence of the summoning mage as a basis for determining success. If the helmsman comes across an unexpected obstacle (a reef, or another ship), it immediately notifies the caster. The helmsman could theoretically be adapted to control a number of different types of transport.

The material component (consumed) is a small doll of a helmsman worth no less than 1 gp.