Wheel of Wind and Water

From Eberron: Rising From the Last War, page 280 and; Wayfinder's Guide to Eberron, page 117.

Description
Wondrous item, uncommon.

When mounted at the helm of an elemental galleon or airship, this wheel allows a character who possesses the Mark of Storm to telepathically control the elemental bound into the vessel.

If a wheel of wind and water is mounted on a mundane sailing ship, a character with the Mark of Storm can create an area of ideal conditions around the vessel, increasing its speed by 5 miles per hour.