It's two flags, November and Charlie, hoisted one above the other.
http://www.boatsafe.com/nauticalknowhow/vdflags.gif
Also, a signal consisting of a square flag having above or below it a ball or anything resembling a ball
http://boatsafe.com/nauticalknowhow/distress.htm
Any flag flown upside down is a distress signal.
Distress.
The flag used to indicate distress is the International Code Signal flag "N" (November), which is a square flag with a white and blue checkered pattern. Additionally, the widely recognized signal for distress is the International Distress Signal, which can be represented by a flag or by the use of other signals such as flares or sound signals. In maritime contexts, the "N" flag signifies that a vessel is in need of assistance.
Any flag flown upside down is a signal of distress.
It is a DISTRESS signal ... calling for Help
Inverting any national flag is a signal of distress.
Any flag flown upside down is a signal of distress.
It is flown in reverse to signal distress.
A symbol of mourning, distress and respect
Flying an United States Flag upside down is a recognized distress signal.
it is a distress signal mening you need help
No, that's actually disrespectful. Flying a flag upside down is a sign of distress. For instance, if you were on a sinking ship, you should turn your flag upside down to signal to other mariners that you are in distress.