Which techniques are used to inflate a Crew Life Vest?

The correct choice describes the standard procedure for inflating a Crew Life Vest, which involves two main methods: pulling the red tabs and using the oral inflation tubes. The red tabs activate the automatic inflation mechanism of the vest, allowing it to inflate quickly upon immersion in water. The oral inflation tubes provide an additional option for manual inflation, where the user can blow air into the vest to ensure it is adequately inflated. This dual method is designed to ensure that the life vest can be properly inflated regardless of the circumstances, thus enhancing safety in emergency situations.

Other techniques, such as using a foot pump or pulling a lever, are not standard procedures for life vest inflation and do not align with the established safety protocols required for crew members. Similarly, twisting or shaking the vest does not contribute to the inflation process and could potentially damage the vest or impede its effectiveness. Understanding the correct inflation techniques is crucial for ensuring crew and passenger safety during emergencies.