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2 cards from this section. Quick, good the night before a test.
What is horizontal control?
Think about X and Y coordinates.
Name one common vertical datum.
What average level of the ocean do we use as a reference?
What does horizontal control ensure in hydrographic surveying?
Think about what mapping requires.
Is Mean Sea Level (MSL) a common reference for depth measurements in hydrographic surveys?
Consider its role in navigation.
Evaluate how using an incorrect datum can lead to a 5% error margin in a coastal construction project.
Look at how crucial accurate water depth is for construction.
Given a position fix error of 3 meters in horizontal control, what implications might this have on navigation near a coastline?
Consider the realities of close navigation near hazards.
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