The repeaters are used to avoid confusion. Instead of putting two number 1 flags together, for instance, number 1 is flown with a repeater under it; second repeater repeats number 2, and so on.

PREPARATORY.—Over hoist. Prepare to execute subjoined order.

INTERROGATION.—Alone. What is that signal? or "I don't understand—repeat." Above hoist puts signal in interrogative sense.

ANSWERING.—Flown by ship receiving message indicates that signal is understood.

AFFIRMATIVE.—Alone. Yes. Above hoist puts message in affirmative or permissive sense.

NEGATIVE.—Alone. No. Above hoist puts message in negative sense.

MEAL or NUMERAL.—Alone. Crew at mess. Above or below hoist—the numeral flags are to be taken as numbers simply.

CONVOY.—Alone at fore, means naval convoy. Above hoist means use navy list.

POSITION.—In manoeuvres, hoisted by each ship as it gets into position ordered; lowered when next ship gets into place.

GUARD or GUIDE.—As its name implies—flown by guard or guide ship.