You see a white buoy with orange bands and an orange diamond. what should you do?

If You see a white buoy with orange bands and an orange diamond, you should TURN YOUR BOAT AWAY because no boat is allowed on this area.
In some region of river/lake, there will be a case when that region became too hazardous and dangerous for human because it has a really high rate of contamination. To mark this region, a sign with white buoy with orange bands and an orange diamond is used.

Answer liquidity;