high voltage spark from 1912 spark gap transmitter 4k
Young activists create posters and protest against pollution
K Group of African Kids Playing with Water
Cold man holding portable radio set and trying to catch a signal in blizzard try to call help, middle 4K shot
A person standing holding red smoke plume in winter
4K footage of an office phone over a black background and a hand dialing 911
Wide shot of the morse code symbols written on a paper, the shot is coming into focus and goes out of focus again...
Close-up of young person with syringe after taking a dose. Substance use.
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Striped red and white wind sock blowing in wind showing the direction and speed and helping pilot to operate correctly airplane white taking
Message in the bottle from ocean. Message concepts.
Young activists create posters and protest against pollution
K Portrait of African Boy
Message in the bottle from ocean. Message concepts.
Message in the bottle against the Sun setting down
Cold man holding portable radio set and trying to explain the way for expedition
Message in the bottle against the Sun setting down
Message in the bottle from ocean. Message concepts.
Message in the bottle against the Sun setting down
Footage of the morse code symbols written on a paper, the shot is moving from left to right
Night driving on narrow road to the mountains in search of new adventures
Footage of the morse code written on a paper, the shot moves...
Trembling after taking a dose: Close-up of young person.
telegrapher sending messages using a code key at night 4k
Close up portrait . 4k
Beautiful caucasian school girl using smartwatch outdoor in school park after finishing classes. Happy child talking with her parent on
Beautiful caucasian school girl using smartwatch outdoor in school park after finishing classes. Happy child talking with her parent on
Sad businessman use phone sitting on road near the broken car opened the hood help repair stress problem emergency. Help repair.
A young hero saves a person in distress at a pier
Message in the bottle against the Sun setting down
4K footage of an SOS Morse code signalisation with a led handlamp...
red rolls of fire hoses on red background
A woman sits in her car, which was destroyed in a car accident, and tries to call her insurance company and call for help. woman in a state
Male tourist standing in autumn forest with blue signal fire, tracking shot
A safeguard sitting on a pier notices someone drowning in the water and jumps to help
Desperate businessman standing and speak on phone near the broken car opened the hood road help repair stress problem emergency.
Back of ferry/boat with a life saver ring float and view of water
Footage of a rescue buoy hanging on the ship fence while the ship is moving
Woman takes off medical mask. Female breathes deeply and smiling looking at camera on city background. Health care and medical concept. Close up portrait curly female standing on winter street.
Message in the bottle against the Sun setting down
Message in the bottle against the Sun setting down
K Portrait of African Girl
Message in the bottle against the Sun setting down
The concept of a car breakdown on the way. The man calls for technical assistance on the phone.
Young man had a serious accident and crashed his car, experiences shock and horror while sitting in damaged vehicle
Girl hitch hiking on side of road
Young woman preparing for drug use. Close-up.
young man calls rescuers and insurance agent after serious accident from crashed car
Messages in bottles have been used to send distress messages. Request for help in water on beach by sea or ocean with sand