Ducha-class tug

The Ducha-class large harbor tug (YTB) is a very little known naval auxiliary ship/tugboat currently in service with the People's Liberation Army Navy (PLAN). The exact type still remains unknown, but it has received NATO reporting name Ducha class. More than a dozen of this type have been confirmed in active service as of early-2020s, making it one of the most numerous class of tugs in Chinese service. The Ducha class is a design of single deck with three levels of superstructures, with the top level retracted backward from the edge of the bottom two levels. The Ducha-class tugs in PLAN service are designated by a combination of two Chinese characters followed by three-digit number. The second Chinese character is Tuo (拖), meaning tug in Chinese, because these ships are classified as tugboats.