3 Summer IS here ... That means more people are out on the water... In boats ... or swimming.... And more people ..means more rescues... Some of them dramatic... like THIS case: Three boaters who were rescued by the Coast Guard in May of 2010 after spending TWO days stranded.. FLOATING in the ocean. They were stung by jellyfish, burned by the sun and severely dehydrated. Channel 4's Ashley Mitchem went out on the water today and spoke to rescuers to see HOW they're working to improve techniques to save someone at sea. 3 3 3 0037-431:24-1:28Emergency responders, boats and emergency trucks rush to rescue a teenager reported missing in the water at Jacksonville Beach But this is just for practice. 3 )The scene continues when lifeguards confirm they see the teen in the water outside the surf but lost sight of the person which initiates an response by the lifeguards, including a search by the Coast Guard.It's a scary situation but something that has to be practiced- so when it really happens- rescue goes as smoothly as possible.Rob Emahiser, Captain of Jacksonville Beach Ocean Rescue 27:52:03 The majority of things we do is prevention. So if we do our job perfectly in an ideal world we don't have any rescues. The reality is we do. We get call sometimes at night, sometimes we'll go months without a night call, sometimes we'll get several in one night. So it's really hard to predict that.In this mock rescue - the swimmer was pushed from the shore- something that happens at our beaches when someone gets caught in a rip current. 29:04 even my lifeguards aren't fast enough to swim against a strong rip current. You can be standing on a sand bar or step off into a hole and then you're over your head so it can be just a matter of seconds.If you do get caught in a rip current, swim parallel to shore.Don't panic. Swim diagonally out to shore once you're out of the rip.The groups practicing together were the Coast Guard and various beach rescue groups. Petty Officer 1st Class Lauren Jorgensen, US Coast Guard 34:43 it's really important for us to conduct this training so we are communicating and know what to expect of each agency when working alongside them we know how they are going to operate they know how the coast guard is going to operate so it makes it easier to work together as a teamCLOSE: 24:38 The exercise was less than 20 minutes and in a real life scenario rescuers say it's easy to get someone in the boat the hardest part is locating the victim.AM C4 TLS.