By consuming the Essence of the Avatar of Iron you become one with a battleship from legend.
*Choose an ocean vessel that is renowned for its capacity for direct warfare, your soul becomes its soul. A battleship counts but a pure carrier or other support ship does not.
*You retain your original body however it changes based upon what vessel you chose. These changes are based on your own perception of the ship's qualities, so long as the changes don't make your body more powerful than the ship your imagination is the only limit. As a consequence of this your body becomes as tough as the ship itself.
*You can change the load out of the chosen ship to anything that it could have been equipped with. This can be done once every 24 hours from your perspective.
*At this same time, once every 24 hours, so long as either your original body or the ship is mostly intact, both you and the ship are fully restored in all respects, including consumables. If the ship is at the bottom of the ocean it returns to the surface fully repaired, if your body is buried, burned, or disintegrated it returns to the surface fully healed. This healing includes damage from age, you will always retain your youth and the ship will never rust.
*All aspects of the ship are easily controlled. You will never be overwhelmed by controlling both your body and the ship. There is no maximum distance for this control.
*This includes any form of sensory apparatus that the ship may have built into it.
*A final note: you are not merely 'part of the ship, part of the crew' you are the ship, now go forth with pride.