Why not?
Because what happens when your referent changes? Which direction is Mars from Earth? We obviously need a single navigational system that works anywhere in the universe.
Comment on Why don't compasses have just two Cardinal directions (North, East, -North, -East)?
SendMePhotos@lemmy.world 17 hours agoAh… I love airplanes… To be clear, the issue with this is that magnetic 0 is not the same as true 0. There’s a slight offset that can cause issues. So why not have like… True 0 and magnetic 0. T0 and m0?
adespoton@lemmy.ca 16 hours ago
SpikesOtherDog@ani.social 13 hours ago
Easy! Assuming the earth is the center of the universe, coordinates are 360,360
± the current position of the Earth in the solar system ± the current position of the solar system in the Milky Way. In the Local Cluster, in the Local Group, in the Virgo Supercluster, in the Local Mesh
In order to return, we just go that way: Image
LastYearsIrritant@sopuli.xyz 5 hours ago
There is no center of the universe.
SpikesOtherDog@ani.social 3 hours ago
Huh, guess you are right
guy@piefed.social 14 hours ago
Mars would be that way I assume
adespoton@lemmy.ca 13 hours ago
Plus or minus?
chillpanzee@lemmy.ml 11 hours ago
Fun fact… there is an ICAO effort to “get rid” of magnetic headings for runway numbers. I listened to a presentation they did last year, and as much as I went into it thinking it wasn’t needed, I was a convert listening to them.
Btw, magnetic variation is pretty significant in some places. It’s 13 degrees where I am.
SendMePhotos@lemmy.world 10 hours ago
What’s the new one? I must have missed the presentation. Probably because I wasn’t invited.
chillpanzee@lemmy.ml 9 hours ago
I don’t remember where I watched the presentation. I think it might have been one of Brian Schiff’s videos, but I don’t remember. Here’s a link to it I found online. www2023.icao.int/safety/OPS/…/Truenorth.aspx
SendMePhotos@lemmy.world 8 hours ago
I suppose it makes sense but it feels wrong. I’m so used to having and using magnetic but that isn’t a reason to continue doing less efficient things.
The redundancy aspect is there as when systems would fail (GPS for true), the magnetic redundancy would still come into okay and still work enough to get by.
Image