Dope Tech Episode 2

<<@PimpinBassie2 says : You can use sonar, but 1 ping only>> <<@centerrightproudamerican5727 says : I wonder if they can measure the earths magnetic field and compare it to the latest map for the fields?>> <<@souptime8635 says : You didn’t tell how they locate where they are. You only told how submarines find their rotation and speed, not the location>> <<@sixstix965 says : Ah yes it grew a vestibular system or whatever it's called>> <<@lateefkareem says : So it's basically measuring rate of change of rate of change of position and then do numerical integration>> <<@fallenpastabean804 says : The lengths we go to progress in Science for the purpose of combat is insane>> <<@TheManTheMythTheScam-q1y says : Could you explain the general relativity behind the laser circle? I‘m sure it explains why the light isn’t going the same speed, but i don‘t understand it>> <<@itsyourboyb.s.rathore7950 says : Same way the missile know where it is>> <<@aiev643 says : What about current? Full map of known currents onboard?>> <<@WookSlurm says : "Wait, it's all just odometry ? How do you know where you are after a longer period of time?" "That's the neat part kiddo. You don't...">> <<@thepablorz says : We live in an age of miracles.>> <<@ckcgaming1134 says : How drastic is drift? For a big sub which turns and accelerates slowly, it would probably take longer to start drifting compared to a phone or game controller, but at some point you cannot trust it anymore, so is that at the scale of miles or an ocean>> <<@JUnderscoreC says : Navy could also have a fleet of ships in random locations not near the sub which periodically transmit active sonar pules which have the time and location of the ship encoded. The the sub can passively receive these sonar pulses and work out where they are. This is similar to how GPS works except using active sonar instead of radio waves. I'd be surprised if they haven't been using something like this since the 70s or 80s.>> <<@MethodicalMadness says : That was not confusing at all.>> <<@SilvestreHerrera says : so… they don't know where they are? they just know where they were (I guess last time they surfaced) and factor in acceleration and direction to figure it out?>> <<@Fosten12 says : And this is accurate by how many meters?>> <<@GruntHumor says : How can you find something where that itself doesn't know where it is😂>> <<@ChacUayabXoc says : But that must mean the inaccuracies sum up the further you are from the starting/calibration point. Are their systems that accurate that you can still rely on it when you went once across an entire ocean? Or do they occasionally have to recalibrate in the target territory?>> <<@sagy90 says : This method accumulates huge errors, they probably once every couple kms use the other methods I guess>> <<@THEMOTHDUDE says : Do they really need a gyroscope for which direction they're facing? I mean I get it if it's for roll and pitch, but seriously just use a compass People doing too much these days>> <<@ricky6258 says : My quick question is who the hall are you you guys sold out to private equity>> <<@Joege says : So as far as anyone can know they could still be where they boarded>> <<@NikanPlays says : just to let you know this channel is owned by private equity>> <<@salman0ansari says : such engineering>> <<@karel1441 says : This is just techno magic>> <<@IloveyouJesus7 says : 💜>> <<@bill51250 says : Process is called Dead Reckoning and has been around for centuries>> <<@dmm1877 says : YES. Bring back this type of fun educational content>> <<@lyceumdisna9283 says : "You need to confuse yourself in order to confuse your enemy" ahh hiding system>> <<@KelvynTaylor says : This is the question I was asked during an interview for a junior hydrographic draughtsman position at the British Admiralty in 1977. I replied "I'd ask the captain", which didn't go down too well. I didn't get the job, but a couple of months later they offered it to me when someone dropped out. 😂>> <<@ulooqulg says : Now, explain ..when theres no Computer.. and we will appreciate how amazing U-47 crews did its most famous strike..>> <<@LivinInMyNaNaNaNaEra says : "the missile knows where it is because it knows where it isn't...">> <<@AnthroPersona says : God damn, I love human ingenuity!>> <<@imtryingformoney says : The submarine knows where it is at all times, by subtracting where it is from where it isn’t.>> <<@cookiesaregreat says : So dead reckoning?>> <<@victoryemmanuel642 says : Things like this make me feel like an NPC...how do people figure this this out..>> <<@Madsy9 says : Adding up every turn and every step forward (integration over velocity) is called dead-reckoning.>> <<@phirehazard says : Could you do a whole video on the fiber optic gyroscope?>> <<@atharvawarhade1174 says : Genuine question - if a submarine is calculating the angle and acceleration for location, how do we account the water currents in all this?>> <<@CoolAsFreya says : My immediate guess was "dead reckoning with accelerometers and gyroscopes", but I must admit I hadn't heard of optical gyroscopes before, very cool!>> <<@MosesMatsepane says : People underestimate how small incremental errors in this type of system can throw you off completely over time.>> <<@knowsomething-b8d says : How do they account for earth's rotation?>> <<@SergioMiletto8 says : Answering before watching video: inertial navigation system+compass, AI or software that analyzes sonar or geomagnetic data. Only the first one in war time or mission.>> <<@russellnc says : I could tell you but then ....>> <<@cosmological7773 says : Also ELF>> <<@VoltamatronSr says : Sir, we’re in Arizona.>> <<@iworms says : You're just describing dead reckoning>> <<@kuldeepsankpal6443 says : dead reckoning>> <<@reddcube says : Dead reckoning but with computers.>> <<@jideafolayan says : An antenna can work underwater at VLF frequency when coupled with an mid range amplifier.>>