What is included in the No3 Cabin Secure checks on the B737-8200?

The correct answer focuses on the designated area for cabin secure checks on the B737-8200. In this aircraft, the No3 Cabin Secure checks specifically pertain to the areas assigned between rows 12-23. This section is critical as it encompasses the mid cabin area where crew members ensure that all items are secured and that passengers are safe when the aircraft transitions from one phase of flight to another.

Understanding these checks is essential for maintaining safety protocols, as thorough inspections in this part of the cabin prevent any potential hazards that could arise from unsecured items or other safety concerns. The focus on rows 12-23 ensures that the crew can thoroughly check a significant portion of the passenger seating area that may include various safety equipment and passenger belongings.