Republic of China (Taiwan) Navy small craft at Keelung, 13th March 1981.
I've not been able to identify any of them.
The larger one with the stern sticking out & pennant number 522 looks like it could have been a replenishment ship and according to Wikipedia's list only the 2 current “fast combat support ships” have pennant numbers in the 500 series, but no vessel in the present fleet or decommissioned ships lists have the number 522.