An inflatable structure may be formed from a single piece of flexible film using a provided method of manufacturing. The selectively steerable body configured for being towed by a tanker aircraft via a fuel hose at least during in-flight refueling, and includes a boom member having a boom axis and configured to enable fuel to be transferred from the fuel hose to a receiver aircraft along the boom axis during the in-flight refueling operation. The groove portion includes a first groove portion, a second groove portion, and a third groove portion.