Floating on inner tubes
An inner tube was a circular flotation device that inflated like a balloon within a larger encapsulating tire. An individual could ride within an inner tube on a body of water.
While on a lazy river aboard the Cosmic Duchess, Commander Jack Ransom, Lieutenant Commander Andy Billups, and Lieutenant jg Brad Boimler rode inner tubes to take them to the AWOL admiral Milius' compound. (LD: "The Best Exotic Nanite Hotel")