The vendor shall provide routine transportation via helicopter for the Phoenix Area Indian Health Service personnel, cargo, material and supplies necessary for the personnel subsistence while on duty and periodic transportation of building material, appliances, household goods and medical equipment by way of sling to and from the Supai Canyon. The vendor shall provide a monthly flight schedule and be available for emergent patient and staff transportation in or out of the Supai Canyon. Provide time line for emergent situations if needed. The authorized travelers list is not all-inclusive and additional authorized travelers may be added with a Manifest on official letterhead approved by the Health System Administrator and provided to the vendor.