Fix Tag to [OT]: I think I would consider pressurizing the container to help keep the water out. If you could keep it about 10 pounds +, all leaks would be out. That ought to be workable with a standard scuba regulator & tank. That could also be used to maintain the desired buoyancy. John Ferrell 6241 Phillippi Rd Julian NC 27283 Phone: (336)685-9606 johnferrell@earthlink.net http://home.sprintmail.com/~johnferrell/dixiecompetitionproducts/ NSRCA 479 AMA 4190 W8CCW "My Competition is Not My Enemy" ----- Original Message ----- From: To: Sent: Friday, December 19, 2003 11:34 AM Subject: [OT:]Homemade Ocean Remote Vehical w/Camera > Does anyone have some ideas for building a homemade cable-tethered RV that can withstand pressure depths of 500 feet in salt water. I was thinking of using small propane cannisters as air ballast tanks. and machining a plastic lens bubble for the camera enclosure. The propeller motors (3 axis), PIC based controls would be in a water tight enclosure. I was thinking of standard PVC Pipe and end caps. I would machine O-ring groves. I suppose I need enclosures for standard flood lamps. > I will use PIC based controls to limit the number of conductors from the boat to the RV. > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics