Unseen Crew

Once cast this spell creates ten unseen crew members. An unseen crew member is an invisible, shapeless force that performs the duties of one crew member. It can tie off ropes, hoist sails, swab decks, and other such duties. An unseen crew member possess no other skills. It cannot fight, speak, or even defend itself.
An unseen crew member has a strength score of 10 and is proficient with Navigators tools, Carpenters tools, and all water vessels. It has a skill level equal to your spellcasting ability modifier. It cannot fly, but it can climb, swim, or walk with a speed of 20 feet.
An unseen crew member cannot be killed, but it dissipates if it takes more than 10 points of damage from area attacks (it gets no saving throws against attacks). If you attempt to send and unseen crew member beyond the spell’s range (measured from your current position), the crew member ceases to exist.