Klaxon Mayday SOS above water air-raid alarm alarm alarm bell alarm clock alarm signal alarum alert all straight beacon blinking light burglar alarm buzzer clear crostarie fiery cross fire alarm fire bell fire flag five-minute gun flashing light fog bell fog signal foghorn free and clear gale warning hooter horn hue and cry hurricane warning lighthouse note of alarm occulting light out of debt police whistle signal of distress siren small-craft warning solvent still alarm storm cone storm flag storm warning tocsin two-minute gun unindebted unowing upside-down flag whistle