Because it makes your job much easier without having to yell and it gets their attention.
whistle
Coach/whistle Traffic Cop Lifeguard Train Engineer
it will be in the gift shop soon
Traffic Cop Referee LifeGuard Coach Crossing Guard
Where I lifeguard, 3 whistles mean for a 15 minute break due to Florida Law. In England and Wales this means a lifeguard is about to attempt a rescue (3 whistles, lifeguard goes in)
You can buy the lifeguard suit at the sport shop and you can buy the whistle.
To create a lifeguard costume, you'll need a red swimsuit or shorts, a white tank top or T-shirt with "Lifeguard" printed on it, and a whistle. Accessorize with a lifeguard rescue buoy and a pair of sunglasses for an authentic look. Optionally, a visor or hat can enhance the theme. Don't forget sunscreen for added realism!
Wear the lifeguard outfit and whistle. If someone is drowning go and save them. You must keep a close eye on the water! If there are sharks,fish, or squid eating penguins you must stop them! You could also enforce the no puffles in the water rule if you want. Use your whistle when you see danger or someone drowning!
wolf whistle
Silver Whistles can be purchased from the Sports Catalouge in the Soccer Pitch/Hockey Ring in the Sports Booth. (Ever since the Sports Shop exploded with Popcorn, that's where the Sports catalouge has been located). They return every year like many other items.
I whistle when I'm scared.Sometimes, I whistle but only make a blowing sound.I whistle to keep a good mood.
what is a whistle used for in first aid