Wikipedia
When a marine radio transmission begins with the phrase "Sécurité, sécurité, sécurité" (; French: sécurité), it means that what follows is important safety information. The most common use of this is by coast radio stations before the broadcast of navigational warnings and meteorological information.
Navigational warnings are issued regularly and usually give information about people or vessels in distress and objects or events that can be an immediate danger to people at sea and how they are navigating. In the United States, MARAD (Marine Administration) sends out infrequent advisories about potential global political climate dangers. There are four types of navigational warnings, which are categorized by their location. These areas are NAVAREA IV, HYDROLANT, NAVAREA XII, and HYDROPAC.
Meteorological information is information that is about the marine atmosphere. These meteorological advisories include the development of weather systems such as and not limited to, rain squalls, big tidal drops, major current shifts, lightning storms, hurricane and tsunami warnings, high winds, and cyclones.
It is normal practice to broadcast the Sécurité call itself on a distress and listening frequency such as VHF Channel 16 or MF 2182 kHz, and then change frequency to a working channel for the body of the messages. An equivalent Morse code signal is TTT, with each letter sent distinctly.
Although mostly used by coast radio stations, there is nothing to stop individual craft broadcasting their own Sécurité messages where appropriate, for example, a yacht becalmed (rendered motionless for lack of wind), or any vessel adrift or unable to manoeuvre near other craft or shipping lanes.
Usage examples of "securite".
Bond had nothing on his mind except the frustration of waiting for Station Z somehow to penetrate the reserves of the Swiss Securite and come up with the exact address of Blofeld.
Blofeld was certainly a great criminal, but the Securite must point out that such information could only be legally obtained if the criminal in question was guilty of some crime committed on Federal soil and indictable under the Federal Code.
It might be the champagne, which should really be classed as a valuable social medicament, and reimbursed by the Securite Sociale.
Schofield, my name is Pierre Lefevre, I am from the Direction Generale de la Securite Exterieure.
Best to let the military and the omnipresent Direction Generale de la Securite Exterieure handle this affair.
In a moment he had accessed the private lines within the Paris headquarters of the Direction Generale de la Securite Exterieure, or DGSE.
Arlequin to her case officer at the Paris HQ of the Direction Generale de la Securite Exterieure, on Boulevard Mortier.
Et si tu veux jauer avec securite, Rends-moi mon doux ami, ces dons de l'amitie.