You vastly, vastly underestimate how hard it is to do what you just said. Consider the inverse square law, then consider how hard it is to illuminate things underwater at a depth where there is little to no ambient light. Consider the limitations of sonar and other technologies at extreme distances.
Then extrapolate that in three dimensions across a major light trafficked area.
I get that militaries keep high-tech stuff secret, but what you are proposing is more akin to magic or teleportation than anything reasonable.