"monocacy" continued her patrol operations on the upper yangtze, reclassified pr‑2 on 15 june 1928. she was placed in reserve 24 june 1929. based at shanghai, the gunboat cruised the lower river, making less frequent voyages to her original patrol area between chungking and ichang. she was placed in full commission once again 19 september 1931 to join other american naval vessels on the river in assisting the many chinese forced from their homes by august floods which had inundated of land during the worst disaster in the river’s history. in 1933, "monocacy" began to serve as station ship in various treaty ports during the cruising season, with her crew serving as a landing force in case of trouble.