Final answer:
Navigational marks for informational or regulatory purposes are white with orange geometric shapes, each conveying different types of information or regulations to help boaters navigate waters safely.
Step-by-step explanation:
Navigational marks used for informational or regulatory purposes are white with orange geometric shapes. These markers are part of the aids to navigation system that assists boaters with navigating in waters safely.
The specific shapes, such as circles, diamonds, squares, and crosses, convey different types of information or regulations to the mariner. For example, a diamond shape indicates dangers such as rocks or stumps, a circle denotes an operational restriction, a square gives directional information, and a cross indicates exclusion areas where boating is prohibited.