Can it classify as Inventory or PPE?

Abstract

ABC shipping (private) Limited is a limited liability company incorporated in Sri Lankan and registered under the companies Act no 7 of 2007.It is a transportation Company. Company owns a ship which is called as “Meritine”. The principle activity of this Company is transporting gas & fuel by using this ship. Generally there are two cylinders in every ship in order to balance the ship. Most of the ships have filled these cylinders by using oil but here, this ship has used gas to fill these cylinders. Normally this ship is repaired once per every four years. When repairing ship, the gas filled in the cylinders will release to the air which would be a lost to the company.