How dangerous is an underwater explosion from a grenade?

Assuming the blast from both hand grenades was identical in strength and that you were the same distance from either blast, the underwater explosion, also known as an UNDEX, would be far more dangerous. Let’s have some insight about what an explosion is.

How would a human survive a grenade?

If our body was composed of 100\% water with no hollow air-filled regions, such as our lungs, we would probably survive a grenade as the force from the explosion would be transferred through our bodies. Instead, when the explosion occurs, the shockwave compresses the air inside our bodies in a brutal manner,…

What is the difference between land and water grenades?

Grenades don’t actually carry much explosive charge as they are first and foremost a launcher for steel shrapnel, so I would put good money on a grenade having a smaller radius of lethality under water than on land; the difference being that the lethal effects at the limit of that distance will be different in each case.

How many grenades have been thrown from the ship?

There are 2 grenades that has been thrown; one on your deck and another 1 at the sea and slowly sink down under the water. Both will explode and you just have few seconds to decide.

What would happen if you jumped into a pool with two grenades?

If you chose to jump in the pool rather than endure the explosion on land, we have some bad news for you: You made a disastrous decision. Assuming the blast from both hand grenades was identical in strength and that you were the same distance from either blast, the underwater explosion, also known as an UNDEX, would be far more dangerous.

What would happen if you stood outside the range of grenades?

If you stood outside of shrapnel range for an exploding hand grenade, you’d likely remain unharmed. If you stood at the same range to an underwater explosion, the pressure wave would probably kill you [source: Landsberg ].

What would happen if you got hit by an underwater explosion?

However, an underwater explosion transmits pressure with greater intensity over a longer distance. If you stood outside of shrapnel range for an exploding hand grenade, you’d likely remain unharmed. If you stood at the same range to an underwater explosion, the pressure wave would probably kill you [source: Landsberg].