[{"data":1,"prerenderedAt":166},["ShallowReactive",2],{"project-48858782":3},{"id":4,"name":5,"line":5,"line_source":6,"title":7,"url":8,"domain":9,"maker":10,"posted_at":11,"year":12,"points":13,"comments":14,"rank_in_year":15,"shown_in_year":16,"top":17,"tier":18,"category":19,"subcategory":20,"format":21,"keywords":22,"reception":28,"sentiment":29,"stance_mix":30,"scored_comments":33,"aspects":34,"strip":38,"post_text":40,"what":41,"said":59,"maker_in_thread":100,"shape":111,"grid":112,"attempts":128,"same_week":129,"maker_shows":31,"maker_hidden":159,"reader_version":160,"card":161},"48858782","Airline pilot's interactive guide to aviation radio","title","Show HN: Airline pilot's interactive guide to aviation radio","https:\u002F\u002Fjameshard.ing\u002Fposts\u002Faviation-radio\u002F","jameshard.ing","jamesharding",1783685157,2026,3,8,4016,4366,92,"shown","learning_science","aviation education","web_app",[23,24,25,26,27],"aviation radio","vor navigation","ils approach","dme interrogation","navaids","quiet",null,{"positive":31,"neutral":31,"mixed":32,"critical":32},2,0,4,{"idea":35,"design":36},{"positive":32,"critical":32},{"positive":37,"critical":32},1,[32,13,32,32,39,13,32,39],5,"Hey HN! I'm an A350 pilot, some of you might remember my flying stats page from last year.\n\nMost people assume modern airliners navigate purely by GPS. In reality we still lean on a whole stack of ground-based radio navaids (VOR, DME, NDB, ILS) the oldest of which trace their lineage back to the 1920s.\n\nWith the amount of GPS jamming around the world at the moment, there are regular stretches of a flight where the jet falls back to these older systems to work out where it is.\n\nI first learned all this from a textbook full of static diagrams, and always thought it deserved better. So I built in",{"problem":42,"audience":48,"pricing":29,"motivation":53,"time_to_build":29,"stack":57,"openness":58,"stage":58,"team_size":58},{"value":43,"source":44,"evidence":45},"Aviation radio navigation systems are usually taught with static diagrams that are hard to grasp","maker",[46],{"id":47},"post",{"value":49,"source":50,"evidence":51},"Pilots and people learning about aviation navigation","inferred",[52],{"id":47},{"value":54,"source":44,"evidence":55},"Learned from a textbook of static diagrams and felt it deserved better",[56],{"id":47},[],"unknown",{"praise":60,"objections":75,"requests":76,"questions":83,"alternatives":99},[61,69],{"value":62,"source":63,"evidence":64},"Appreciation for learning about aviation navaids","commenter",[65],{"id":66,"by":67,"text":68},"48862056","Vitamin_Sushi","I love learning about nav aids on planes. One thing I didn't quite understand was the DME interrogation: \"To handle conflicting pulses, each aircraft deliberately jitters its…",{"value":70,"source":63,"evidence":71},"Clear explanation of DME interrogation after follow-up",[72],{"id":73,"by":67,"text":74},"48864792","Oh, now that makes more sense, thanks!",[],[77],{"value":78,"source":44,"evidence":79},"Make the DME pulse-jitter animation more obvious",[80],{"id":81,"by":10,"text":82},"48864324","The pulse pairs themselves are always 12 us apart. The jitter comes from the aircraft sending interrogations at random intervals in a steam, so that it can discern which returns…",[84,91,95],{"value":85,"source":63,"evidence":86},"How often do pilots fly non-ILS approaches outside North America",[87],{"id":88,"by":89,"text":90},"48858967","quibono","I have a question related to aviation though not the submission itself please. How often would you say you get to do a non-ILS landing? I often wonder how common these are…",{"value":92,"source":63,"evidence":93},"How often are VOR approaches flown in practice",[94],{"id":88,"by":89,"text":90},{"value":96,"source":63,"evidence":97},"How DME interrogation pulse pairs are distinguished between aircraft",[98],{"id":66,"by":67,"text":68},[],{"comments":33,"answered":13,"key":101},[102,105,108],{"id":103,"text":104},"48858801","Here was my interactive logbook post from last year for those interested: https:\u002F\u002Fnews.ycombinator.com\u002Fitem?id=44396518",{"id":106,"text":107},"48859009","Valid question! The vast majority of approaches are still using an ILS. Pretty much the only time we would use an alternative approach (most often RNAV or LPV, and rarely VOR)…",{"id":109,"text":110},"48859036","As for VOR approaches, I have done a handful in my career, especially into some of the smaller airports around Europe (Greek islands!), but these are gradually also being…",{"commenters":13,"max_depth":33,"maker_replies":33,"first_comment_mins":13,"lifespan_hours":14},[113,115,117,118,119,122,124,126],[103,32,32,114,10,37],"project\u002Fpositive\u002Fnone",[88,32,13,116,89,32],"maker\u002Fneutral\u002Fnone",[106,32,32,116,10,37],[109,32,32,116,10,37],[120,32,39,121,89,32],"48860638","maker\u002Fpositive\u002Fnone",[66,37,13,123,67,32],"project\u002Fneutral\u002Fidea",[81,37,32,125,10,37],"project\u002Fneutral\u002Fdesign",[73,37,39,127,67,32],"project\u002Fpositive\u002Fdesign",[],[130,135,140,144,149,154],{"id":131,"name":132,"points":133,"category":134},"48845049","18 Words",1160,"games",{"id":136,"name":137,"points":138,"category":139},"48842459","colibri",937,"ai",{"id":141,"name":142,"points":143,"category":134},"48896286","Super Dario",397,{"id":145,"name":146,"points":147,"category":148},"48875377","Ant",330,"languages",{"id":150,"name":151,"points":152,"category":153},"48883305","Juggler",280,"dev_tools",{"id":155,"name":156,"points":157,"category":158},"48926939","Firefox in WebAssembly",273,"creative",false,"v2",{"id":162,"name":5,"line":5,"ai":159,"cat":19,"year":12,"points":13,"comments":14,"rec":28,"s":29,"top":17,"kw":163,"maker":10,"domain":9,"tier":18,"attempts":32,"strip":164,"url":8,"mix":165,"praise":62,"objection":-1,"sub":20},48858782,[23,24,25,26,27],"03005305",[31,31,32,32],1794036704688]