Enable this little mod with JSGME and you get the compass scale on all tools.
http://www.subsim.com/radioroom/show...postcount=1308
As for the SACF, it realy is the American version of the German 'Angriffscheibe' ('Attackdisk'). So it's a different thing which you'll find in SH4 mods. But yeah, same thing in practice, it calculates between relative bearing, true bearing AOB and own course. The button to get it to the front is the knob on the right above the message bar.