What should be avoided when exiting a vehicle that has sunk in water?

When exiting a vehicle that has sunk in water, it is crucial to avoid opening the door right away. This is because the pressure of the water outside the vehicle is significantly greater than the pressure inside when the vehicle is submerged. Opening the door can create a large influx of water that will make it nearly impossible to escape and can lead to the vehicle sinking more rapidly. It is generally recommended to wait until the water pressure equalizes, which occurs when the vehicle is nearly full of water, before attempting to open the door.

Instead, another more effective option is to break a window to allow for a more manageable escape route. This method ensures that you can create a way out while minimizing the risks associated with changing the pressure dynamics suddenly. It is also advisable to remain calm and to use any available means to shout for assistance as needed, but the focus should always remain on maintaining control of the situation and ensuring a safe exit.