Ground stabilized displays are best for navigation and charting and use which data?

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Ground-stabilized displays align with the Earth, so for navigation and charting you need data that shows actual movement over the ground. Course over ground tells you the ship’s path direction relative to the Earth's surface, and speed over ground tells you how fast you’re moving over that surface. Together they reflect current effects, drift from currents, and give an accurate ground track on the chart. Data like heading and speed through the water describe motion relative to the water itself, not over the ground, so they don’t provide the ground-truth position needed for chart plotting. Winds and currents are environmental factors, not the fundamental navigation data used to position the vessel on a chart. A ground-stabilized display focuses on the true ground track provided by course over ground and speed over ground.