Which of the following is the correct course for flood water when immediate passage is unsafe?

• A. Go through water as fast as possible
• B. Stop and wait for it to recede
• C. Drive slowly in a low gear with high engine speed
• D. Use reverse to exit water

Answer: (C)

When flood water makes passage unsafe, you need to keep enough engine power to avoid stalling while moving through the water smoothly. Using a low gear gives you maximum torque at low speed, and keeping the engine revving high ensures the engine can breathe and push through the water rather than bogging down. This combination helps prevent the engine from stalling as you advance, while a controlled, slow crawl minimizes the impact of water against the vehicle and reduces the chance of water flooding the air intake.

Rushing through water can cause more forceful water entry and damage, waiting for water to recede isn’t reliable if levels are changing, and using reverse through water is risky and may flood the exhaust or damage the drivetrain. So maintaining a steady, slow crawl in a low gear with higher engine speed is the safer, more effective approach when passage isn’t clearly safe.