05300.0 KHz/USB (intruding the 60mt amateur band), Turkish Mil prob. from Izmir area, TUR. STANAG-4285 600bps/L carryng async 5N1.5 (Turkish "T-15") stream: most likely encrypted pseudo-random naval broadcast since after removal of start/stop bits the resulting 5-bit stream does not autocorrelate (ACF = 0). A similar S4285 transmission but with 15/128 bits length period has already been reported here.
Notice that "T-15" is not an official name nor a well-known name: it's just a nickname I use in this blog to refer to this Turkish 15-bit format.
Signals and recordings gathered thanks to KiwiSDRs: kiwisdr.yo3iul.ro, sdr.ok2kyj.cz.