If the shark is close to people, a siren is activated on the helicopter and a PA used to communicate the sighting. Beach authorities are notified and they assess whether the beach should be closed and for how long.
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Contracted helicopters with trained observers on board search the water for sharks within 500 metres of a beach. All sharks seen are recorded via a purpose-built app. Target shark sightings are reported live to the SharkSmart app and Twitter channel to warn beachgoers and beach authorities.
Is it safe to swim in Florida beaches sharks? Naylor emphasizes it's perfectly safe to swim in Tampa Bay, but you should always know what to do in case you see a shark. He advises to: Avoid swimming at dawn and dusk, when sharks tend to be on the hunt.
“Don't go swimming far out. Stay in close. Stay near people,” Hueter said. Despite Florida being the shark bite capital of the world, the risk is still incredibly low.
Thus when flight or vision conditions are not optimal, such as a night time, Civilian Helicopters don't fly due to the risk of hitting something which always ends badly for the Helicopter and usually also to its crew and passengers or cargo.
Yes, there have been a few examples when helicopters have been able to fly beyond Everest. In 1972 an Aerospatiale SA 315 Lama was able to fly up to to12,442 meters for the first time, making up a world record. This record was beaten in 2002 when Eurocopter AS350 B2 flew over the height of 12,954 meters.