A multi-engine rating is an additional certification that allows a pilot to operate aircraft with more than one engine. This rating is essential for flying larger planes, as multi-engine aircraft typically offer better performance, speed, and safety compared to single-engine planes. To obtain a multi-engine rating, pilots must complete specific training and pass both a written exam and a flight test. This training focuses on the unique handling characteristics of multi-engine aircraft, including engine-out procedures and performance management, ensuring pilots are well-prepared for various flying scenarios.