Which of the following data layer categories...

🔍 Key Concepts

• ECDIS (Electronic Chart Display and Information System) primary purpose and core data sources • Difference between chart data layers (what comes from the chart/HO) and system or ship data (what comes from sensors or calculations) • How Notices to Mariners are used in relation to electronic charts

💭 Think About

• Ask yourself: Which option describes information that is more about the ship’s own behavior or performance rather than charted geographic information? • Which items are clearly related to chart production and updates versus onboard calculations or sensor inputs? • Think about what the Hydrographic Office actually provides and what ECDIS must show to be a legal replacement for paper charts.

✅ Before You Answer

• Identify which choices are clearly tied to official ENC (Electronic Navigational Chart) / Hydrographic Office chart data. • Identify which choice most clearly relates to vessel performance characteristics (e.g., maneuvering, turning, squat), not chart features. • Remember that Notices to Mariners are used to update charts—consider whether that means they appear as a separate "data layer category" or are already incorporated into the chart data.

Which of the following data layer categories is NOT displayed on ECDIS?

ECDIS warnings and messages

Notice to Mariners information

Ship hydrodynamic information

Hydrographic Office data

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🔍 Key Concepts

💭 Think About

✅ Before You Answer