What is the first action to take when locating an explosive device using the 5 C's?

The correct action to take when locating an explosive device, according to the 5 C's, is to confirm. This initial step is critical as it involves verifying the presence of an explosive device before any further actions are taken. Confirmation ensures that responders are working with accurate information, which helps in assessing the situation appropriately and planning subsequent steps.

By confirming the device, personnel can gather necessary intelligence regarding the environment and possible threats, which is vital for ensuring the safety of all involved. This stage sets the foundation for the actions that follow, including clearing the area and establishing a cordon to protect the public and responders.

In this context, while other actions like clearing or cordoning off the area and controlling the scene are important, they are secondary to the confirmation step. Without confirming the presence of an explosive device, it would be premature to enact any protective measures or operational protocols.