• Introduction of novel developements in high-power blue lasers at 450 nm, which enable long-range transmission in water.

• Initial experiments and theoretical insights regarding future underwater defense capabilities.

• Review of key applications including secure optical communication and direct energy deposition for structural modification or material ablation.

• Discussion of strategic potential for defense scenarios such as ASW, MCM, ISR, and MSA, especially in deep submerged wireless covert communication and manipulation.