life-saving equipment 
Instruments and equipment for signaling a boat’s presence and for saving people from drowning.
Device that automatically transmits a radio distress signal giving its precise position.
Lamp that produces an intense light from a gas, which glows between two electrodes.
Metal rod that emits the radio signal into the atmosphere.
Instrument that makes a regulation sound when visibility is reduced to indicate the presence of a boat.
Bell mouth that amplifies the sound emitted by a diaphragm when compressed air passes over it.
Small container of compressed air.