What is the best driving practice when driving through deep water, when it is unavoidable?

When driving through deep water is unavoidable, using a low gear while maintaining higher RPMs can indeed be a beneficial strategy to prevent stalling. A low gear provides better control and traction, which is crucial when navigating through water that may affect the vehicle's performance.

Maintaining higher RPMs helps in ensuring the engine is working harder, which can assist in keeping the engine running and prevent it from stalling in challenging conditions. This practice can also help eject water from the exhaust system and reduce the risk of hydro-locking, which can occur if water enters the engine.

However, it's essential to approach deep water cautiously, as other factors may come into play, such as the water's depth, current strength, and conditions of the road. While finding a route around the water is often the preferred option, if entering the water is necessary, managing speed and gear appropriately contributes to safer navigation. Thus, driving in a low gear with higher RPMs represents a practical approach to maintaining vehicle control and engine performance in such situations.