cathodic protection system in submarine?
472172
CPS( cathodic Protection System) EQUIPMENT - The system is comprised of our proprietary 32-bit Windows-based software package and associated digital underwater hardware.   CPSS is utilized in fresh, brackish, and salt water for cathodic protection surveys of structures including pipelines, outfalls, and platforms.\n\nThe system is ideally suited for underwater surveys as CPSS may be configured either as a towed fish, or attached as a sub-system interface to a remotely operated vehicle (ROV).  CPSS acquires real-time data from two CP channels with ± 5 mV accuracy, and real-time tow fish or ROV X/Y/Z coordinates from an integrated surface/subsurface navigation package.  In the tow fish configuration, the CPSS fish is towed along the pipeline route at speeds of up to 5 knots.  A precision echo-sounder is incorporated into the tow fish which enables operators to maintain the tow fish altitude within 20-feet of the seabed.  The system provides cost effective data collection on outfall or pipeline systems in up to (-) 450 FSW.  The adjacent screen capture shows the operators screen during a survey of a pipeline which is protected with impressed current with interrupters installed for the survey.
369059
Matter a fact I am pretty sure the U.S.Navy has an installation there anyway. Mass could fight back! There are several submarines at port there.
554085
http://www.corrosion-doctors.org/Biographies/GalvaniBio.htm
956167
yes but you you would have to make sure that the water pressure is not too high so only on shallowish sea beds and it would be dangerous if the structure did fail it's bye bye to everyone.\nWe have made air tight structures before (eg space craft and submarines) so its possible just not practical.
603026
Let's see..thumbing through my USCG Regulation Manual....\nArticle 69, section 38D states: "In the event of emergency\nany and all silicionized devices can be used as PFD's."\n\nGuess that is a yes.
1131804
You have the potential for galvanic corrosion.  Essentially, two metals at different potentials share electrons and one metal (the one with the higher potential) will start to erode and "plate" the other metal.\n\nTypically, using some sort of material that is a non-conductor (ceramics, rubber, etc) between the two or passivating the metal surfaces or coating the metal surfaces (prime and paint per ANSI standards) are your best options to prevent this.
696672
I have a drawing that shows the various types of shell and tube exchangers. I believe their functions are self evident if you see the cross sectins.\n\nSend me you email address and I'll send the drawing.
369302
Q: Is it safer to swim in salt water than fresh water if lightning is in the area?\n\nA: It is definitely NOT safe to swim when lightning is in the area in any type of water. Even if current lightning is a few miles away, lightning can pop up in new parts of the storm very quickly. Salt water conducts electricity, which means that it can easily travel through the water toward you. The lightning current may spread out in all directions and dissipate within 20 feet or so, but don’t bet your life on how close the strike will be. As the highest object on the water, you may be the most likely target. \n\nAnswers archive: Lightning safety and survival\nhttp://www.usatoday.com/weather/resources/askjack/archives-lightning-safety.htm\n\n-------------\n\n The voltages involved in lightning are so high that even materials that would normally be considered non-conductive become conductors, including the human body. The voltages are so massive that if they start to travel through a boat's structure - say through its mast - then meet with high resistance (for instance, the hull skin) the current discharge, in its attempt to reach ground, may simply blow a hole in the non-conductive barrier. The safety conscious Captain should make sure that his vessel is properly protected. Reference should be made in detail to the standards for lightning protection as set forth by the American Boat and Yacht Council (ABYC) and the job should be performed by a licensed marine electrician.\n\nCone of Protection from Lightning - Faraday's Cage\nhttp://www.boatsafe.com/nauticalknowhow/lightning.htm\n\n------------------------------\n\nElectrical current can easily travel through them and then to you.\n\nLightning protection tips\nhttp://www.aroundcentralflorida.com/features/lightning/
7965
As a former submariner let me take a stab at this one...\n  Structurally the sub would fare fine in space as the pressure hull is designed to enclose a pressurized and self-contained environment for humanbeings.  The ship would not be ripped apart, easily as earlier suggested, or at all.  The flexible steel (HY 100 is the designation) is designed to flex under exerted compressing force, but that has little relevance to the discussion.  think about it this way, the space shuttle would not be a survivable vehicle under the sea due to its construction, however it is also no "ripped" apart in space.  To follow in that vein, human beings operating in the near-vacum of space are also not ripped apart, but tend to drift away from objects if not strapped to them.  Now that we have established that the submarine would be well suited to survive in space let's deal with some other issues.\n  The key problem with a submarine crew survivng in space would be where the air would come from.  Submariners breath air that is derived from one of two place, the outside atmosphere or through the process of electrolysis whereby H2O is brought into the ship and split into basic hydrogen and oxygen atoms.  The oxygen is circulated through the boat and the hydrogen is released through a diffuser back into the water.  In the case of an emergency apparati called "oxygen candles" are used to produce limited amounts of oxygen while the crew either repairs the problem or awaits rescue.  \n  So, to sum up, the submarine itself would be fine in space, assuming you could engineer enough boost to get it there and figure out a way for it to provide a means of propulsion (the propeller/screw is clearly going to be useless) for itself.  The submarine crew would be faced with how to breath given that the native atmosphere creation equipment isn't suited to a near-zero oxygen environment.  Other than those minor issues, where do I sign up?
280756
My grandfather had one of these.\n\nWARNING: THIS DEVICE WILL PRODUCE A LETHAL ELECTRICAL SHOCK HAZARD, KEEP AWAY AT ALL TIMES. USE AT YOUR OWN RISK. I WILL NOT BE HELD LIABLE FOR DEATH, INJURY OR PROPERTY DAMAGE DUE TO MISUSE.\n\nThis is SOOOOO simple. You will need a steel rod sharp at one end and a plastic handle w/attached single insulated wire at the other. You will have to fabricate this. Wire must be 25 feet long and of 12 or 10 AWG. The rod will be 1.5 feet long.\n\nUsing a polarized plug, connect the single insulated wire to the smaller (HOT) of the plug prongs.\n\nDirections for use:\n\nAn area of about 10 feet from rod WILL PRODUCE A LETHAL ELECTRICAL SHOCK HAZARD, KEEP AWAY AT ALL TIMES. USE AT YOUR OWN RISK. UNPLUG THE DEVICE BEFORE APPROACHING IT.\n\nThe ground must be somewhat moist (not wet), best results are in the shade or cloudy day.\n\nFirmly push the rod into the ground at least 20 ft away from any building.\n\nPlug in the polarized plug into a socket for no more than 5-10 minutes at a time (this depends on ground moisture).\n\nAn area of about 10 feet from rod will produce worms in the time specified, if not, try a different location.\n\nClean and oil rod after every use to prevent rust. AVOID GETTING OIL ON THE HANDLE AS OIL IS CONDUCTIVE.
317397
no doubt, disposal of nuclear under the sea in not the safer solution. lead blocks can not be stable for years together . if possible it will never withstand for 1000 years . so there will be dangerous radiations raniating which will affect aquatic organisms & later pollute the atmosphere
584806
we have them now.  submarines run on nuke power with an onboard reactor.  there are plenty of solar powered devices.  calculators come to mind.
535174
There is often a wide divergence between theory and application.  I remember one application where lengthy mechanical linkages and cables were used to transmit rudder position for a huge seagoing ship in the even that the steering gear room became flooded (and electronic indication was lost).  The system had too much lost motion to indicate rudder position even though it looked good in theory.  I suggested connecting a vertical rod to the rudders that pierced the overhead into the ("unflooded") compartment above which could be connected to a reliable electronic transmitter (similar to existing "flooded" transmitters) and that worked much better.  Even electronic control systems can exhibit unexpected hysteresis when built.
1081595
This is not recommended, but in the past we shocked fish with a generator. We just hooked a cable up to it and threw the exposed end in the water. I don't know if the new generators have GFCI's on them, but if they do you may have a problem
142072
Salt water works better because it's a better conductor of electricity as opposed to just tap water.  In salt water, you have a solution of both Cl- and Na+ floating about creating a means of transferring electricity (electolytes).  So, instead of a saltbridge to provide the transfer of ions, all the ions needed are right there, which will quickly drain the battery.  Think of it as a short circuit - you have a large current because the path of resistance from the cathode to the anode is nothing.  Plus, there's plenty of ions to provide that means of conduction.
753710
take a 9 volt or higher battery,attach a wire to the pos terminal and 1 to the negative terminal...stick wires in water dont let em touch...after a while youll see bubbles on each wire....Hydrogen will be the bubbles on 1 wire and oxygen on the other...this is splitting the water molcules..
691399
Titanium with special alloy bolts so saltwater doesn't corrode. Light weight for its strength.\nSome deep sea are silica glass. The strength increases as the compressive loads are applied.\nCheck Jacques Cousteau. He made some special deep diving.\nWoods Hole Oceanographic Institute has Alvin.