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FrozenVent posted:how do you feel about sight reduction tables? do you still have to learn celestial navigation? i guess it makes sense on a ship; i don't think long haul commercial aircraft even have high enough windows to do it anymore?
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# ? Sep 21, 2018 03:04 |
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# ? Jun 8, 2024 15:43 |
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FrozenVent posted:if you’re wondering why the distinction is important, see, for example, https://ti.arc.nasa.gov/m/profile/adegani/Grounding%20of%20the%20Royal%20Majesty.pdf this is incredible, tyvm my favorite bit so far is the SOL indicator
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# ? Sep 21, 2018 03:05 |
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Sagebrush posted:You literally cannot. It is mathematically impossible. all the GPS receiver knows is the displacement between two subsequent points, and it has no way of determining whether that displacement was because the vehicle pointed in that direction and flew forwards, or if it tried to hover in place and was blown sideways, or any combination in between. which lets you determine the heading, with sufficient time Sagebrush posted:I would just like to point out that I recognize that fishmech thinks they are winning here by getting other people riled up, a la "jokes on them I was only pretending" comic, but I genuinely do enjoy talking about navigational nitpicks like this because they come up a lot as I'm learning to fly planes so it's all cool i am winning because it's already conclusively proven gps works fine in the arctic or near magnetic poles, which blows apart your dumb post where you stated it doesn't work. the rest is just ya idiots trying to sob about how its slightly difficult to use.
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# ? Sep 21, 2018 03:06 |
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FrozenVent posted:k now imagine the drone is on a treadmill but how will it take off
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# ? Sep 21, 2018 03:06 |
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Can GPS help this thread navigate out of this derail?
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# ? Sep 21, 2018 03:09 |
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fishmech posted:which lets you determine the heading, with sufficient time Richard Feynman posted:The guy seemed to know what he was doing, and I was sitting there, hanging on If the analogy here is not clear to you, I can explain it. Just let me know
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# ? Sep 21, 2018 03:09 |
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fishmech posted:which lets you determine the heading, with sufficient time no because the external input vector varies over time and you have no way to measure it because your point of reference is moving in a way you cannot assess independently of the external input vector because you are not measuring heading seriously dude hobbesmaster posted:do you still have to learn celestial navigation? yes but I’m a ship guy we all had to go up on the roof of the school with sextants and figure out how high the sun was over the church steeple (because there horizon was blocked by the drat church) also sight reduction table are easy mode bs and if you use them on a ship lol just lol
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# ? Sep 21, 2018 03:10 |
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President Beep posted:they’d have to find each other first. lol
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# ? Sep 21, 2018 03:20 |
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President Beep posted:they’d have to find each other first. haha
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# ? Sep 21, 2018 03:21 |
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lol fishmech got banned again
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# ? Sep 21, 2018 03:21 |
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noooooooooo! I was this close to getting them to admit they were wrong!!!! drat you fishmech! drat you to hell!
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# ? Sep 21, 2018 03:23 |
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Roosevelt posted:lol fishmech got banned again and weirdly, not even for this FrozenVent posted:noooooooooo! I was this close to getting them to admit they were wrong!!!! don't worry, fishmech will return he always does
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# ? Sep 21, 2018 03:25 |
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if boston is such a poo poo-tier shoal-infested harbor why don't they have harbor pilots? or was the grounding outside of their area of effect
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# ? Sep 21, 2018 03:25 |
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FrozenVent posted:no because the external input vector varies over time and you have no way to measure it because your point of reference is moving in a way you cannot assess independently of the external input vector because you are not measuring heading in fact you can determine your heading from gps.
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# ? Sep 21, 2018 03:26 |
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that was fast.
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# ? Sep 21, 2018 03:27 |
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JawnV6 posted:if boston is such a poo poo-tier shoal-infested harbor why don't they have harbor pilots? or was the grounding outside of their area of effect it was outside the pilotage area pilots usually work on visual cues, so they’re not as affected by electronic navigation issues, but... they gently caress up on the regular too
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# ? Sep 21, 2018 03:28 |
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fishmech posted:in fact you can determine your heading from gps. no you cannot
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# ? Sep 21, 2018 03:28 |
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can’t squish the fish
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# ? Sep 21, 2018 03:28 |
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fishmech posted:in fact you can determine your heading from gps. this is “actually the sky is green” level of wrong
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# ? Sep 21, 2018 03:29 |
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FrozenVent posted:no you cannot yep, you can!
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# ? Sep 21, 2018 03:29 |
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fishmech posted:yep, you can! please explain how
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# ? Sep 21, 2018 03:29 |
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FrozenVent posted:it was outside the pilotage area
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# ? Sep 21, 2018 03:30 |
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FrozenVent posted:please explain how track your locations over time and compare it.
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# ? Sep 21, 2018 03:30 |
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JawnV6 posted:oic, sf's starts out at the farallones 30+ miles out, thought boston could afford that kinda classy setup doesn’t SF have sandbanks all the way out? pilots are hella expensive they make your port uncompetitive if you have them out too far fishmech posted:track your locations over time and compare it. that’s course over ground, not heading
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# ? Sep 21, 2018 03:31 |
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# ? Sep 21, 2018 03:33 |
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FrozenVent posted:
which allows you to determine what heading you must have
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# ? Sep 21, 2018 03:33 |
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fishmech posted:and you can determine that from the gps data. it is simply harder. HEADING IS NOT NECESSARILY DIRECTION OF TRAVEL
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# ? Sep 21, 2018 03:33 |
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gpiss
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# ? Sep 21, 2018 03:34 |
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# ? Sep 21, 2018 03:34 |
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# ? Sep 21, 2018 03:34 |
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Godholio posted:HEADING IS NOT NECESSARILY DIRECTION OF TRAVEL it allows you to determine your heading
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# ? Sep 21, 2018 03:35 |
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can we talk about microwaves some more? my parents got a microwave I think from my mom's parents as a wedding present when they got married in 1970-whatever and they still have it and it still works great its brown.
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# ? Sep 21, 2018 03:35 |
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fishmech posted:it allows you to determine your heading If I face 360 but move 180, what will GPS tell me?
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# ? Sep 21, 2018 03:37 |
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is it tonkatsu or is it schnitzel ?!
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# ? Sep 21, 2018 03:37 |
Sagebrush posted:I would just like to point out that I recognize that fishmech thinks they are winning here by getting other people riled up, a la "jokes on them I was only pretending" comic, but I genuinely do enjoy talking about navigational nitpicks like this because they come up a lot as I'm learning to fly planes so it's all cool i agree that fishmech is wrong on a gross conceptual error level now let me tell you about navigation via signals of opportunity like cell towers or radio stations broadcasting from kuwait city. fixed reference ekelund ranging based on assumptions still better than trying to get true bearing off of gps
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# ? Sep 21, 2018 03:37 |
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fishmech posted:in fact you can determine your heading from gps. wish you'd find your heading to gbs
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# ? Sep 21, 2018 03:37 |
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hell yeah
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# ? Sep 21, 2018 03:40 |
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do you go for the cocktail sauce or do you go for the straight up fresh lemon juice
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# ? Sep 21, 2018 03:40 |
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Godholio posted:If I face 360 but move 180, what will GPS tell me? it tells you there’s an Xbox in front of you
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# ? Sep 21, 2018 03:41 |
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# ? Jun 8, 2024 15:43 |
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the wonder bread years, starring bread savage
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# ? Sep 21, 2018 03:41 |