50Bd/300 async 5N1.5 FSK (likely Serbian-Mil)

6374.8 KHz (cf) async 50Bd/300 FSK using 5N1.5 framing, after demodulation:
UFBV UFBV UFBV de FNCS FNCS FNCS
E9U9 E9U9 E9U9 de FNCS FNCS FNCS
Z64G Z64G Z64G de FNCS FNCS FNCS
Friends from UDXF group suggest Serbian Army as the user.

https://yadi.sk/d/SblPr4eOCLpR4Q