Yes, you are right on! I have an RC submarine called a Typhoon just like the one in my avatar. My first pic project was an electronic compass as you cannot use GPS underwater. A representative from China was going to buy compasses from me and said my compass was too precision as it is accurate to 1/10 of one degree. They only wanted to pay for 1/2 of one degree accuracy. At one point it seemed they only wanted the design and software so I published the information thus putting it in the public domain. The sub has twin drive motors with temperature sensors mounted on the. There is also a roll and pitch sensor, angle sensors on the bow planes, stern planes and rudder. A sensor for speed and another for depth. There is a sensor for battery voltage and current draw. A laser pointer has been added to the "sail" for targeting. The periscope is 3 mm in diameter and about 2" long with a first surface mirror at the top sending picture down the tube through some acromat lenses then a dove prism lens to reverse the image left to right to avoid using a second mirror. Below the dove prism lens is a "snake camera" which is 3/4" square pointed up the periscope. Since it is a small size it is able to pan left and right. One of the larger challenges was being able to transmit video from underwater. With a "strange" antenna configuration video could be transmitted from a depth of 1 meter, possibly more as my Jacuzzi is only 1 meter deep. There are also torpedoes and missiles fueled by compressed air. Others had used Estes rocket motors until one guy fired a missile from his swimming pool, it broke surface tension, make a left turn, cleared the fence, when through a screened in patio, and set fire to a couch that his neighbor was taking a nap on! Since this, we have all gone to compress air. My torpedoes have an optional nose cone made from a foam paint brush soaked in water color the dried. When these torpedoes are fired they leave a small orange trail and a large orange dot on whatever it hits (like duck butts!) So there are a lot of features and sensors that would be great to display the readings of. Okay, that's the basics.

Best, Ed