What does U flag mean in sailing?
The U Flag is displayed when there are some difficulties in starting the fleet, and would normally be flown following a General Recall on the previous Start. It forces sailors to be less aggressive in their sailing tactics, by restricting their movements and severely penalising an early start.
What does yellow and black nautical flag mean?
In years gone by, editions of the International Code of Signals (ICOS) did contain signals for vessels that suspected they harbored, or could be harboring, contagious diseases. In Brown’s 1916 edition the L (Lima) flag (black and yellow squares) signified ‘I have or had some dangerous, infectious disease on board.
What does a black flag mean?
In general, black flags are used by enemy forces to signify that enemy combatants are going to be killed rather than taken prisoner—essentially, the opposite of the white flag used to represent surrender. … Most black American flags are entirely black, meaning that stars and stripes become almost impossible to see.
What does code flag A mean?
Individual flags have specific and standard meanings; for example, diving support vessels raise the “A” flag indicating their inability to move from their current location because they have a diver underwater and to warn other vessels to keep clear to avoid endangering the diver(s) with their propellers.
What is the N flag?
1 Answer. In all architectures that support flags, the N or Negative flag simply matches the most significant bit of the last number computed. In addition many architectures have a V or Overflow flag which tells you if the most significant bit was changed by the last operation.
What is a quarantine flag?
Medical Definition of quarantine flag
: a yellow flag hoisted by all ships to request pratique on entering a harbor, by a ship to show that it has contagious or infectious disease aboard, or by a ship that has been quarantined. — called also yellow flag, yellow jack.
What does the maritime quarantine flag look like?
The plain yellow flag (“Q” or “Quebec” in international maritime signal flags), may derive its letter symbol from its initial use in “quarantine” but, in modern times, the flag indicates the opposite — a ship that declares itself free of quarantinable disease, and requests boarding and inspection by the relevant …