What is the maximum size of the largest white retroreflective letter on Preferred Channel Marks?

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Multiple Choice

What is the maximum size of the largest white retroreflective letter on Preferred Channel Marks?

Explanation:
The key idea here is readability of marks at night. Preferred Channel Marks use white retroreflective letters to identify the channel, and there’s a defined limit to how large those letters can be. The largest white retroreflective letter on these marks may not exceed 16 inches in height. This size strikes a balance: big enough to be read from a useful distance under coastal/nautical lighting, yet small enough to fit on the buoy’s surface and keep a consistent, standardized appearance across the fleet. If the letter were smaller, readability at night would suffer; if it were larger, it could look out of place on the buoy and disrupt the mark’s overall design.

The key idea here is readability of marks at night. Preferred Channel Marks use white retroreflective letters to identify the channel, and there’s a defined limit to how large those letters can be. The largest white retroreflective letter on these marks may not exceed 16 inches in height. This size strikes a balance: big enough to be read from a useful distance under coastal/nautical lighting, yet small enough to fit on the buoy’s surface and keep a consistent, standardized appearance across the fleet. If the letter were smaller, readability at night would suffer; if it were larger, it could look out of place on the buoy and disrupt the mark’s overall design.

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