The plain yellow
flag ("Quebec" or Q in international maritime signal flags), perhaps
derives its letter symbol for its initial use in quarantine, but this flag in
modern times indicates the opposite—a ship that declares itself free of
quarantinable disease, and requests boarding and inspection by Port State
Control to allow the grant of "free pratique"*.
- Sold color nylon Yellow (Quarantine Flag)
- 12" x 18"
- Fabric: Nylon
- Type: Sewn
* Pratique is the license given to a ship to enter port on
assurance from the captain to convince the authorities that she is free from
contagious disease. The clearance granted is commonly referred to as free
pratique. A ship can signal a request for pratique by flying a solid yellow