In the U.S. system, red channel markers carry what kind of numbers?

Even numbers. Green ones are odd.

  1. Even numbers ✔
  2. Odd numbers
  3. No numbers

Why: 33 CFR 62.43 says solid red aids carry even numbers and solid green aids carry odd numbers. The numbers increase as you head in from sea.

Huh, didn't know that: Red even and green odd numbering is the same in IALA Regions A and B, even though the colors swap sides.

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Sources

  1. 33 CFR 62.43 Numbers and letters (eCFR) https://www.ecfr.gov/current/title-33/section-62.43

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