Dong-I Industrial CO was founded in 1900 and produces marine transmissions, among other products for the marine sector. It specializes in the entire product development process and its application: design, implementation, production, sales and service. It is characterized by its constant innovation and challenges leading to transmissions that stand out for their specifications and ease of use.

Dong-I transmissions are quiet in operation, light weight and has the same reduction both forward and reverse. These are easy to maintain, and no consumables are required, except for the zinc anode.