Originally Posted by rgscpat
Chapman's of course has lots of material on flags.
While the proper use of burgees is a matter of tradition and etiquette, the Q and courtesy flags are a more serious matter.
Not trying to split hairs but I am not aware of any formal requirement for pleasure vessels to fly flags or even maintain a flag other than as a visual distress signal.
Last time I re-entered US waters I read the CBP reporting criteria and there was no flag flying requirement, there was a requirement to report with the vessel at specified locations.
Again, not being argumentative but if I am wrong I am always open to learning something new.