When studying the chart supplement for KSBD, I saw the following:
SOCAL APP/DEP CON 125.5 (SW–N) 127.0 (N–NE) 134.0 (NE–S) 135.4 (S–SW).
What do (SW–N), (N–NE) etc mean?
Thanks in advance for the answer!!!
Best
Lucky

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The above is with reference to making a transition of the KONT airspace. For KONT the chart supplement shows the following:For example looking at our route of flight from KSBD to KEMT you would see that to transition the KONT Class C airspace from the North East you would contact SOCAL approach on 127.00.