Grigorovich M-15 (alternative designation ShCh M-15 sometimes also Shchetinin M-15) was a successful Russian World War I-era biplane flying boat developed from the M-9 by Grigorovich. The M-15 was a smaller version of the M-9 intended to replace the latter however it was only built in small numbers due to shortage of the more powerful Hispano-Suiza engines. After the summer of 1917 it was mostly used as a trainer.
Made by Shchetinin.
It is the successor of the Grigorovich M-9 .