F-14 approach AoA, is it really 15 degrees?

Elsewhere I've read that the Tomcat flies "units" of AoA, not degrees, with
its AoA range of -10 to +40 degrees being converted to units in the 0 to +30
range. That would mean the formula for converting units to degrees in that
plane is [UnitsAoA = .6 * DegreesAoA + 6]. I've also read that approach AoA
for the F-14 is 15 units, which would be... 15 degrees! Holy crap. Is that
correct? That seems awfully high (too far nose up) to me, especially given
the Hornet's ideal 8.1degrees. Can anyone confirm or correct these values?
Or is there something weird going on with wing angle of incidence (or
something else) that throws a spoke in my assumption that 15 degrees AoA
means 12 degrees nose up on approach. (15, minus 3 for the glideslope.) Any
help appreciated. Thanks!

Scott