What does ECDIS do when there is a loss of position, heading, or speed sources?

What does ECDIS do when there is a loss of position, heading, or speed sources?

• A. Continuously updates the last known position
• B. Provides an alarm
• C. Displays a message on the screen
• D. Switches to manual navigation

Answer: (B)

When there is a loss of position, heading, or speed sources, ECDIS is designed to provide an alarm to alert the navigator about the situation. This immediate notification is crucial, as it helps ensure that the operator is aware of any issues with the ship's navigation data. This alarm acts as a warning to prompt the crew to assess the situation, verify navigation inputs, and potentially take corrective action. The system's functionality includes monitoring the integrity of navigation data, and an alarm serves as an important safety measure. Other options, while they may seem plausible, do not align with the primary safety features of ECDIS during a loss of critical navigation data. Continuous updates or switching to manual navigation might imply that the ECDIS still has reliable data, which is not the case when sources are lost, and simply displaying a message does not provide the immediate urgency that an alarm would convey. Therefore, the provision of an alarm is the essential and correct response from ECDIS in such scenarios to safeguard navigational safety.

When there is a loss of position, heading, or speed sources, ECDIS is designed to provide an alarm to alert the navigator about the situation. This immediate notification is crucial, as it helps ensure that the operator is aware of any issues with the ship's navigation data. This alarm acts as a warning to prompt the crew to assess the situation, verify navigation inputs, and potentially take corrective action.

The system's functionality includes monitoring the integrity of navigation data, and an alarm serves as an important safety measure. Other options, while they may seem plausible, do not align with the primary safety features of ECDIS during a loss of critical navigation data. Continuous updates or switching to manual navigation might imply that the ECDIS still has reliable data, which is not the case when sources are lost, and simply displaying a message does not provide the immediate urgency that an alarm would convey. Therefore, the provision of an alarm is the essential and correct response from ECDIS in such scenarios to safeguard navigational safety.