AhaBulbStuff Everyone Should Know
AhaBulb: Stuff Everyone Should Know · ahabulb.com/boat-regulatory-diamond-cross-keep-out

An orange diamond with a cross inside, on a white marker, means what?

Boats keep out of the marked area.

Start playing free

  1. Danger ahead, go slow
  2. Information about nearby services
  3. Boats are excluded from the area ✔

Why: 33 CFR 62.33 says a diamond with a cross centered inside means vessels are excluded from the marked area. An open diamond without the cross just means danger.

Huh, didn't know that: If a regulatory marker is lit, its light is white.

The dad joke
Why did the lifeguard kick the elephants out of the pool? They kept dropping their trunks.
Like this card?
Play the game

References

Answer: Boats are excluded from the area. 33 CFR 62.33 says a diamond with a cross centered inside means vessels are excluded from the marked area. An open diamond without the cross just means danger.

  1. 33 CFR 62.33 Information and regulatory marks (eCFR) www.ecfr.gov/current/title-33/section-62.33
    A vertical diamond shape having a cross centered within indicates that vessels are excluded from the marked area.
    Checked 2026-10-08.
  2. USCG A Boater's Guide to the Federal Requirements for Recreational Boats (2023) www.uscgboating.org/assets/1/AssetManager/Boaters-Guide-to-Federal-Requirements-for-Receational-Boats-20231108.pdf
    If lit, the light will be white
    Checked 2026-10-08.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Boating & WaterA white marker with an orange open diamond shape means what?Boating & WaterOn an orange-and-white regulatory marker, what does an orange circle mean?Boating & WaterAn orange square on a white sign or buoy gives you what?

That's stuff everyone should know.