OFFICE OF THE DIRECTOR OF NATIONAL INTELLIGENCE Preliminary Assessment: Unidentified Aerial Phenomena 25 June 2021

theblackvault.com/Government-UAP-UFO-Report.pdf ^

[GOPJ]

Let me guess. We’ve been lied to.

You've come up with an truism... kind of like 'this too will change'...

[GOPJ]

Some reports of a 88 knots per hour....

[TXnMA]

"I’m talking about Transmedium craft operating underwater at unprecedented speeds."

Given adequate hull strength, what's the difference between a spacecraft, an aircraft, and a submarine?

BTW, it's well known that creating cavitation ahead of a submarine or torpedo allows orders of magnitude faster underwater speeds. (The Russians are doing it .[Look up "Shkval"]...)

[TXnMA]

"Interesting that radar works underwater !"

~~~~~~~~~~~~~~~~~

Ever hear of "Ground-Penetrating Radar"?

Water, like air, (and UNlike soil/rock) is a fluid medium...

Look up "SAR"... (a 'cool tool')... '-)

[TXnMA]

Oooops! Meant to include you in #43... Apologies!

TXnMA

[TXnMA]

Thanks for the clarification!

[GOPJ]

Thanks

[Reily]

Yes worked with it in the past and GPR only works under certain conditions and its penetration is limited. Being a fluid has nothing to do with it !

[TXnMA]

I've done a bit of reading on SAR:

"Metallic objects and water have a higher dielectric constant and are more reflective, however since they are smooth with respect to the system wavelength, and usually flat, the radar beam is specularly reflected, away from the sensor."

Interface problem...

I stand corrected.

Thank you.

TXnMA