Toyo12/Shutterstock The U.S. Navy is no stranger to the surface of our oceans, and indeed, its fleet of submarines means this familiarity extends to the murky depths. However, traditionally the submarine fleet's roles include surveillance and deterrence, missions that involve spending much of their operational time trying to avoid the seafloor. This is beginning to change. As noted by Naval News, the U.S. Navy has begun to treat the seafloor not as something to avoid, but as a new battle space. This raises an interesting point — what is there on the seafloor that the Navy feels strongly enough about to consider…