Los Angeles International (KLAX) has four SoCal Approach frequencies:
128.5 for approaches from 45 - 89 degees
124.9 for approaches from 90 - 224 degrees
124.5 for approaches from 225 - 44 degrees, and
124.3 for approaches "from the west."
Does anyone know what approaches "from the west" includes, and why they would not be included within approaches from 225 - 44 degrees?
128.5 = Harbor sector. Covers everything north/northeast of Santa Monica Pier, with a ceiling of 7000ft, IIRC. All 24L/R arrivals are handled by this sector.
124.9 = Downey sector. Covers everything east coming in on the RIIVR2/SEAVU2 arrival stream. All 25L/R frequencies are handled by this sector.
124.5: I can't remember the name of this sector. However, this covers the arrivals from the west, meaning those coming in from the west, on the SADDE6/MOORPARK3/LEENA4 arrivals. This is a Feeder sector; just like the sector at the east end of SoCal, one sector sequences the arrivals to be fed into Downey or Harbor sector. In this case, This sector feeds Harbor from the west for the SADDE6/MOORPARK3 arrivals, as well as feeds Downey from the west for the LEENA4 arrival.
124.3... this one handles those arrivals who aren't fast enough to handle the SADDE/MOORPARK stream. Think of those Saabs, Brasilias, and other props going up the central coast to SBA, LPC, SMX, SBP, etc. Those are a separate stream in itself, which are also fed into Harbor sector. They are kept below the SADDE/MOORPARK stream, and merged in somewhere between SADDE and SMO, all going to Harbor sector for 24L or 24R.
Give you a better picture?