Drone Command And Control Center 3.2 Drone Home Delivery System "Functional Flow Block Diagram - FFBD" 3.2.18 Return To Base Subsystem Drop & Deliver Subsystem Verify Communications Subsystem Communications Subsystem 3.2.2 3.2.8 Navigation Subsystem Verify Navigation Subsystem 3.2.3 3.2.9 3.2.17 Pickup Subsystem 3.2.16 Safety & Abort Subsystem 3.2.4 Verify Safety & Abort 3.2.10 Subsystem All Systems GO Initiate UAV Mission 3.2.15 Command And Control Subsystem Propulsion Subsystem 3.2.5 Verify Propulsion Subsystem 3.2.11 3.2.1 Pickup & Delivery 3.2.6 Subsystem Verify Power & Energy 3.2.12 3.2.14 Power and Energy 3.2.7 Subsystem Verify Power & Energy 3.2.13