The ability to survive a shockwave while diving or swimming underwater depends on various factors, such as the intensity and proximity of the shockwave, the depth of the water, and the individual's distance from the source of the shockwave.
In general, being underwater can provide some level of protection against the direct impact of a shockwave, as water is denser than air and can dissipate energy more effectively. Additionally, the surface of the water can act as a barrier, reducing the force of the shockwave that reaches the submerged individual.
However, it's important to note that shockwaves can still transmit through water and cause injuries or damage, especially if they are extremely powerful or the individual is in close proximity to the source. High-energy shockwaves, such as those generated by large explosions, can still pose a significant risk even when underwater.
Moreover, secondary effects, such as the displacement of water, turbulence, and the potential for flying debris, can present hazards to someone underwater even if they are not directly exposed to the shockwave.
In summary, while being underwater may provide some level of protection against shockwaves compared to being on the surface, it does not guarantee complete safety. The best course of action in situations involving shockwaves, such as those caused by explosions, is to avoid the area and seek shelter or move to a safe location as quickly as possible.