I don't know how to interpret the airway designation below.  For example, what does the "B" mean? I can't seem to find any info on that in FAA documentation, etc.

Thanks for any help,

Al

 

 

See here in the map legend in the online user manual: https://www.littlenavmap.org/manuals/littlenavmap/release/2.8/en/LEGEND.html#navaids

The legend is also linked from the help menu. B means both, Jet and Victor.

Alex