12/13/2023 0 Comments Lnav vnav vs lpvIt was considered an emergency procedure only. When I flew the OH-58 A/C (which was not instrument rated), we would use our GPS to fly practice RNAV approaches to LNAV minimums in case we inadvertently punched in. Why can’t you use handheld GPSs? Handhelds don’t have adequate backup power, they may drop signal at a key time, but more importantly, they don’t have Receiver Autonomous Integrity Monitoring (RAIM capability) which is an FAA requirement.Īnother side-note: you can always do practice emergency RNAV approaches to LNAV minimums if you don’t have an IFR certified installed GPS. You have to stick to VOR and ILS approaches only. I’m just saying you can’t legally file, ask ATC for, or accept an RNAV approach. I am not saying you can’t use your GPS when flying IFR for situational awareness. You won’t be able to file an IFR flight plan with the “/G” designation. Side-note: No! A handheld GPS or your iPad is not approved for GPS/RNAV approaches so don’t even go there. Go find another article to read, this doesn’t apply to you. If you don’t have an incorruptible (you can’t modify approaches) GPS installed in your aircraft (ie Garmin 430 or 530), you can’t do GPS approaches. If you don’t want to pay to update your database, you can read how to do that by clicking here. You can avoid updating the database, but it’s a pain because you have to check the lat/long points by hand. You may think you can do RNAV approaches when you can’t.įirst, an RNAV approaches are approaches using an IFR certified GPS installed in your aircraft which gets updated every 28 days. Why are some LNAV/VNAV minimums greater than LNAV minimums?īefore we get started, I want to make sure I am talking to the right audience.How do you know if you can fly one vs the other?.
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