by kullery » Sat Feb 22, 2020 5:12 am
I'm not a controller, but I can tell you that historically the TEC routes were defined on the assumption that aircraft were not RNAV (i.e. GPS) capable. Therefore, the majority of the TEC routes only include way points which can flown /A.
A relatively recent change has been the creation of 11 "parallel" routes which originate in the San Diego area. These are designated with an "R" suffix (i.e. SANP4R vs. SANP4). These routes require RNAV capability, are generally more efficient and may include way points which don't even appear on the en-route IFR charts.