They have room, power, and the budget for things that us recreational divers do not.
Also actual rooms full of maps and charts and things, and people trained to use them.
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They have room, power, and the budget for things that us recreational divers do not.
They have room, power, and the budget for things that us recreational divers do not.
Hi Stuart, yes they have maps, money etc, but I'm referring to the physics which is the same whether for a sub or a diver. How do they know where they are on the map?
Again being one that has seen a clark gable movie or so. I can tell you with some credibility.I wonder how submarines that stay deep for long periods of time navigate. They use sonar to avoid objects but how to navigate?
I would worry about the battery.
$60-ish for raspberry pi, $40 for the IMU, you need to have someone with CNC mill to cut the body plus some CAD-fu to design it. And a pressure pot for testing. Maybe not a high school project, but 1st year college for sure.
You may or may not be very surprised in the accuracy of todays gyro systems It is not unusual for a system to be up 6 months and not be off more than a few yards. I suspect that your question is based on movies like hunt for red october where a sub is shown cruising along the bottom floor at 20 knots through canyons and never hitting anything,, using a stop watch and counting down the turn. To that I will say something has to add suspense to a movie.Okay, I'm intrigued. Does anyone know what IS the technology that allows them to do it? Does a sub rely entirely on inertial navigation for the entire time it's below radio (e.g., GPS) penetration depth?
If your modern gyro is inside a moving frame of reference, you still get all that Einstein stuff, right? So what, they start them at perfectly calibrated standstill and keep them spinning until they're back in the pen?
Back to the main topic. It should not take long perhaps a month to take a shearwater ,,,, redo the guts install a couple of accerometers and write a basic program to record the movements sensed and present it as a number of vectors on a screen The start being the entry point and the end being current position relative to the start. After that it will probably take a few years to refine the system but the cost really should be low 200 perhaps. all off he shelf items. only the program will be unique. None of this is communications so the battery issues and low power cpu usage should be ok.