SALSFShort Approach Lighting System with Sequenced Flashing Lights
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Only ALSF-1, ALSF-2 and SALSF systems have red terminating bars or red side row bars.
The red terminating bars and red side row bars referenced in 14 CFR 91.175(c)(3)(i) are only found on ALSF-1, ALSF-2, and SALSF approach light systems.
Some keep a few flashers more and are the SALSF. Note the "SALS" and "SALSF" versus the "SSALS" and "SSALF"; the double S means the parent system was an ALSF-2.