signal rocket

signal rocket

[′sig·nəl ‚räk·ət]
(ordnance)
A rocket that gives off some characteristic color or display which has a meaning according to an established code.
References in periodicals archive ?
Suddenly a signal rocket was launched, splashing the darkness red as more than 800 torches were lit and held aloft by the members of 46 squads of local people, nearly 1000 participants.
At Z+45, daylight signal rockets were to be fired from both flanks of the jumping off trenches and to guide the raiders back.
In the evening, all the ships fired their respective company's night signal rockets in turn.