11K0F3E = Super Narrowband FM (AKA SNFM).
It's the standard modulation scheme for Land Mobile between 150 and 470 MHz, and has been mandated for those users since January 1, 2013.
Many radios label it as NFM.
For reference:
11K0F3E = Super Narrowband FM (AKA SNFM)
16K0F3E/20K0F3E = Narrowband FM (AKA NBFM)
30K0F3E = Frequency Modulation (AKA FM) (I think that's the correct designation)
There are also a couple wider FM modes for NTSC TV and FM Broadcast.
BTW, the designations SNFM/NBFM/FM are EIA terms. The xxK0F3E are FCC emission designations.