Many members of the military and their families like to cool off by using low-cost swimming pools found on many bases around the world. But this year the annual tradition of swimming laps under the sun and whizzing down waterslides is taking a hit due to the automatic federal budget cuts. Some installations are closing their outdoor swimming pools altogether, while many others are reducing hours or opening fewer days each week. The Navy says its closures and reduced hours will save it $2.3 million. The pools and water parks are typically open to active-duty personnel, family members, military retirees, Defense Department civilians and their guests. The costs can range from free to just a few dollars. Most of the savings from the closures are due to spending less on lifeguards.