Briefly discuss BNWAS, LRIT and VDR/S-VDR with respect to safety of navigation?

flowchart TD
    A[Safety of Navigation] --> B[BNWAS\nSOLAS V/19.2.2.3\nMSC.128(75)]
    A --> C[LRIT\nSOLAS V/19-1\nMSC.263(84)]
    A --> D[VDR/S-VDR\nSOLAS V/20]
    B --> E[Monitors bridge watch\nAlerts on non-response]
    C --> F[Transmits identity/position\nto flag/authorized users]
    D --> G[Records audio & sensor data\nfor accident investigation]

• BNWAS: SOLAS V/19.2.2.3 mandates BNWAS; must run whenever the ship is under way at sea; conforms to MSC.128(75)
• LRIT: SOLAS V/19-1 requires automatic transmission of ship identity, position, date/time; performance standard MSC.263(84)
• VDR/S-VDR: SOLAS V/20 carriage; records bridge audio and sensor data for accident investigation; S-VDR accepted for certain existing ships
• ETO lens: install, maintain, test and verify data interfaces and power supplies for all three systems