Type 625 oceanographic research ship is a series of oceanographic research ship developed by China for its People's Liberation Army Navy (PLAN). The series consisted of three models, A, B & C, but A & B are usually grouped together as one because C model differs from Models A & B on much greater scale. Originally designed to replace earlier Type 614, Type 625 has been replaced by its follow-on Type 636, and has since either retired from active service of PLAN and transferred to civilian agencies.