Most Helpful Member
Ever wonder about communication with submarines? I know aircraft have been used, all you do is get above the sub area and deploy a long wire antenna, about six miles long. Pretty simple huh? Communication at a depth of 100 meters is not going to be easy, even wired. Figure roughly atmospheric pressure is about 14.6 PSI. That pressure increases about 1 atmosphere for every 10 meters so at about a depth of 100 meters that is about 146 PSI or 10 atmos of pressure on whatever is down there. Tethered maybe to a surface buoy may work.