97-million-year-old fossils reveal the earliest known animal "GPS"

Gosh.

Actually I am a pilot and use those things on a regular basis.

And tells you nothing about where you are on the Earth.

And tells you nothing about where you are on the Earth.

So you're admitting you were wrong, and that sonar alone can't tell you your location.

You also seem to be claiming you've used sonar and radar, or you have designed them. Please do tell us about the experience! Sharing your wisdom would be way better than hurling random insults.

What is this supposed to be? Are you operating sonar in a swimming pool? a rectangular lake with walls? Are you using directional sonar? Is it 3d sonar? Do whales have directional sonar? What does a "coastline echo" even look like? Do you have to surface the submarine and look through binoculars to see if there's a coastline?

How do you tell your location on Earth from all this?

No.

Your reference says a sonar ping can travel up to 300 miles. It doesn't say you can get an echo return from

It says nothing at all about coastline or 600 miles. Where are you getting this from?

"Several miles" is a better estimate of sonar range, probably less for directional sonar.

Wow! You can use sonar to tell how deep you are! Goodbye, simple pressure sensor!

Or, I could just be right for free, and spare my dollies the indignity.

Sonar can do far better than that.

A pilot should know the difference between heading and bearing. A "bearing relative to the Earth's magnetic field" doesn't even make sense.

Pilot? Old situation, lost, no GPS, no clue listen with directional antenna for 2 known radio stations Get the angle between those,

And bats (the animals that YouAsh press-incident tramp had Faulty use to kill millions with COVID) even locate and catch small moving insects using ultrasound for navigation. All in 3D and all in motion. They can find their home too, and communicate with each other using that same ultrasound.

Every 'location' has it own ultrasound 'sound' (spectrum), like you can hear with normal ears the sound of waves crashing on a beach. The brain (located for humans between the 2 ears) have this thing called 'memory' that creates a map of where you were, communication and DNA also passes it on the the next generation of animals so they 'naturally', know where to go Small; fish, whales, what not.

There is a lot more to it.

Are you seriously suggesting that animals and birds don't know where they are because they go around reading maps?

Animals learn migration patterns either from following the crowd or by some mechanism we don't yet know and remember the details of their route. Next time they have to go to that destination, they follow the same route by observing (optically or acoustically) the same details.

I had the experience of visiting a particular shop in a medium-sized city with a friend and her dog; the dog had never been to that city before and could not possibly have known any of the route we took. We didn't pay much attention to him and just assumed he was going where his mistress directed him. On the way back, we decided to cross the road and follow a slightly different path but the dog became fretful and anxious, he was definitely trying to tell us we were going the wrong way.

As soon as we regained our previous route, he settled down and led us back to the car. Not only had he remembered the route we took to the shop but he had worked out how to follow that route in reverse. At dog level, without even the wider overview that bipedal humans had of the streets, that was a remarkable feat and was achieved without any kind of map except the one he created in his own head as we went along.

So are some whales (Globicephela macrorhynchus).

That should have been:

Right, so I presume you're not old enough to remember the times before Christopher Columbus found the Americas, and are therefore ignorant of the fact /corn/ is used for "the most popular grain" in the local area.

These days, it's usually wheat on the European side, and Maize on the American side.

It's been different grains in different areas at different times, but you wouldn't want to admit that, because? You presume /corn/ only exists in English?

Am I nerd-splaining this well enough for you? Do I need to draw you a picture, or perhaps invent a time machine? Does H.G. Wells' work well enough for you?

Does the Phoenician /qrn/ sound familiar to you? Do you want to buy some from them? Do you think they went to the Americas to buy it first?

So, if you're next going to nerd-explain something to me, better be damn sure I don't laugh at your pitiful attempts!

Please forgive me for using the wrong dictionary. That's /horn/ not /wheat/ or corn.

I don't quickly find anything online about /qrn/ being /korn/ in Euro- pean languages, so you'll just have to dig it up yourself, the nerd that you are.

I'm fairly certain it was one of the etymologies proposed by Bernal in his great epic, /Black Athena/, so you can read all three volumes and get back to me if it's not there.

Best wishes, and happy etymological research of /corn/!

Such has been obsolete for years now and even in the heyday it required a map to work. You draw a bearing line through both stations on a map and where the lines intersect is your postition. No map, no position.

Which tells you nothing about where you are on the Earth. There are no maps or databases of "ultrasound transmissions underwater".

Sure bats can find bugs with ultrasound but they can't tell if they are in New York or Mexico City.

Which varies minute by minute and there is nothing unique about the noise at every location on the planet.

Childish nonsense. Marine animals have no clue whether they are off San Pedro, Long Beach, Seal Beach, Huntigton Beach, Newport Beach of Laguna Beach.

A heading is the angular direction you are going or plan to go.

A bearing is the angular direction of somewhere else from your current position.

The angular direction is measured as either relative to true North or magnetic North corrected for local magnetic variation.

There is also generally a difference among course, heading, and track.

Bats, birds, and butterflies migrate thousands of miles and arrive at tiny destinations. Somehow.

But arrive exactly where they want.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

They do not use those names, the map in their brain is so each place has its own sound, reflection signature to put it simple.

They also communicate with each other and use memory. Different beaches, rocky coasts, human infested places, different depth, different temperatures, different speed and direction of currents, all places have their own acoustic signature. Imagine music, acoustics. And taste of the water, probably many more factors, friends they know, relations with other animals

There is a lot more to it.

Bats, birds, and butterflies migrate thousands of miles and arrive at general areas, not specific locations.

Which is a general area, not a specific location.

Do you really not understand the difference between arriving somewhere off the coast of California and arriving at Long Beach Harbor?

Yeah, sure they do.

I think someone has spent far too much time watching cartoons with talking animals...

You are shifting the issue. FYI birds even find back and use their own nest from the previous stay.

Fish seem to find locations too for putting their eggs, same place they were born.

Once near the coast they will go there.

Sometiese one gets confused, there recently was some whale in Germany that got up a river, people tried to bring it back to the ocean to save it, they managed to do that, but it died a bit later,

Do you think insults are rational discussion?

Salmon hatch and float down a stream out to sea. Years later, from thousands of miles away, they find the very place that they were born in, within meters, to lay eggs for the next generation.

What electronics are you designing lately?

They may have difficulty reading the street signs.