To drive on a **waterlogged road section**, it is important to maintain control of the vehicle and avoid dangerous situations. **First gear** is the most suitable in these conditions for several reasons:

- **Control and traction:** First gear provides more control and traction to the vehicle, which is crucial when the road is covered with water. This helps prevent the vehicle from skidding or losing grip.

- **Reduced speed:** Driving in first gear allows you to maintain a low speed, which is essential to react to any unforeseen events and avoid the risk of hydroplaning.

- **Safety:** By driving slowly and with more control, the risk of accidents is reduced, especially in conditions of reduced visibility or in sections where water may hide obstacles or irregularities in the road.

For these reasons, it is advisable to use first gear in situations where the road is waterlogged, thus ensuring safer and more controlled driving.