Final answer:
FSV Collocation allows the FSO to co-locate with FIST using FSV, enhancing collaboration and coordination.
Step-by-step explanation:
FS vehicle employment option that allows the FSO (Foreign Service Officer) to co-locate with FIST (Foreign Internal Security Teams) using FSV (Field Security Vehicle) is known as FSV Collocation. FSV Collocation allows FSOs to be deployed alongside FIST personnel, enabling them to work together in the field and provide security and support.
This option enhances collaboration and coordination between the FSOs and FIST teams, leading to improved effectiveness and efficiency.