In Florida, the state divers‑down flag/device is a red flag (square or rectangular) with a single white diagonal stripe running from the top left (staff side) to the bottom right corner.

What the Florida divers‑down flag looks like

  • Overall shape: Square or rectangular flag or symbol.
  • Background color: Solid red field.
  • Stripe: One bold white diagonal stripe that starts at the top left (near the flagstaff) and runs to the lower right corner.
  • Symbol type: This same red‑with‑white‑diagonal design is used on flags, buoys, or other divers‑down warning devices.

Florida law calls this pattern the “divers‑down symbol,” and any legal divers‑down warning device (flag or buoy) must display that red background with the white diagonal stripe in that direction.

TL;DR: In Florida, the state divers‑down flag/device is red with a white diagonal stripe from the upper left to the lower right, on a square or rectangular flag or buoy.

Information gathered from public forums or data available on the internet and portrayed here.