For a time-available evacuation on land, what is N4 responsible for?

N4 is responsible for the white first aid kit (FAK) during a time-available evacuation on land. In aviation safety procedures, specific crew members are assigned particular responsibilities to ensure an efficient and organized response during emergencies. The white FAK is crucial for providing medical supplies to address injuries that may occur during an evacuation, which is essential in ensuring the safety and well-being of passengers and crew.

The other options serve different purposes: loudhailers are used for communication, emergency locator transmitters (ELT) help locate downed aircraft, and life jackets are primarily for overwater evacuations. Therefore, while they all play important roles in safety procedures, N4's specific responsibility in this context is the provision of first aid supplies through the white FAK. This detail highlights the necessity of having specific equipment readily available to respond effectively in emergencies.