Interestingly, the way approaches are 'numbered', theoretically, ATC should be spring loaded to give you the Z approach. I think the main reason you need GPS for the Y is for the missed approach. If you don't have DME and you don't have a GS, you have to use the higher minimums. The Z you fly a heading to intercept a radial and then go to JIVOM.ĭepending on your GPS, you may or may not have GATEQ in the database. The Y you go essentially directly back to JIVOM. Granted, ATC will probably give you something lower than 5800' before you get to JIVOM and clear you for the approach, but theoretically, it could happen. If you are flying the Z, the MSA is 5800' all the way to JIVOM and you will need to use the holding pattern to descend (unless you think you can configure and lose 2800' in 7.4 NM. If you are coming from the northeast, it is NoPT so if you need to hold to lose altitude you need to ask for it. If you are at 6000' for the Y, cleared direct JIVOM, and cleared for the approach, you could descend to 4900' within 30 miles and 3000' within 4 miles of JIVOM. The Z has cross tuning radials for JIVOM and the Y does not. If you compare the Z and the Y you can see some differences. So, for some reason you're flying a LOC approach but if you have a GPS you can take advantage of the lower MDA if you can identify GATEQ. Perhaps the GPS REQUIRED applies to that last fix only since ATC can confirm the other 2 fixes defined by the BZM 143 & 164 radials? (Perhaps both RADAR and BZM are suspect below 1460 MSL.)įWIW, the 1280' MDA with GATEQ matches the MDA for the LNAV approach. I wonder, I do not know, but the other 2 fixes on the LOC are labeled RADAR and are defined by BZM radials. (And DME is not listed as a requirement on the approach.) I did see the towers so I buy the logic, but it still seems a bit screwy to me. There is an ILS Z approach as well that doesn't require GPS, and still lists the GATEQ minimums with GATEQ identified only by DME. The funny thing is, this approach says "GPS Required" which technically means you have to have GPS to use it, so why would they even mention this extra set of minimums.
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