The 480 channel Asian Fishery Radio (27.500 MHz FM to 39.475 MHz FM, straight 25 kHz steps, sequential channel numbering), simplex FM voice and FSK data only, regular carrier squelch or CSQ - no CTCSS tone or DCS use - which is actually helpful in ruling out other possibilities when hearing Asian languages on frequencies that match that band plan, since carrier squelch is not used as often (for FM mode anyway) on lowband.
Yep, there are numerous exceptions I know, including my very own (locally used) Virginia State Police SIRS on 39.5400 MHz FM (but, 39.540 doesn’t match the band plan and is outside the 27.5 MHz - 39.475 MHz range.
According to the specifications for the FT-801 Dedicated Fisheries Radio / 480 Channel Fishing Boat Transceiver, voice inversion scrambling (probably rolling code inversion) is an option.
I checked 11m and VHF low first thing this morning as the sun was coming up - 31.750 MHz had POCSAG paging bursts on it (fading in and out).
UK on site hospital paging
31.725 MHz, 31.750 MHz, 31.775 MHz
plus general on-site paging
48.875 MHz - 49.475 MHz (12.5 kHz steps).
Italian pagers
40.0125 MHz
40.0375 MHz
40.0625 MHz
40.0875 MHz
Italian 43 MHz “VHF CB” license-free voice and data, 43.3000 MHz - 43.5875 MHz (12.5 kHz steps). Lots of data link/telemetry systems on these frequencies.
The 26 MHz paging, 27 MHz paging and 29 MHz paging frequencies (Europe wide and the UK) are likely very busy since 11m, 10m and 6m are all waking up (again!) today.
US and the rest of the Americas 27 MHz RCRS data/paging (license free, 4w power limit on all channels except 25w power limit on 27.255). 8 kHz bandwidth limit, any data mode permitted.
26.995 MHz
27.045 MHz
27.095 MHz
27.145 MHz
27.195 MHz
27.255 MHz - shared with CB Channel 23
a steady MFSK data signal and/or a rapid FSK burst on 26.995 and/or 27.195 seems to appear whenever the band is open to Latin America. Data bursts and paging (including POCSAG!) on 27.255 whenever the band is open.