Abstract: A multi-functional umbrella includes a first rod and a collapsible canopy directly anchored thereto. A second rod is pivotally attached to the first rod, and a handle section is monolithically formed with the second rod and spaced from the first rod. A mechanism automatically penetrates the second rod beneath a ground surface. A mechanism broadcasts audio signals and is housed within the second rod and the handle section, and includes a radio and a speaker electrically coupled thereto. A mechanism discharges a predetermined quantity of fluid from the first rod. The automatic penetrating mechanism and the broadcasting mechanism and the fluid discharging mechanism are simultaneously and independently operable as desired by the user.

Abstract: An unmanned system for investigating underwater regions utilizes an unmanned mothership and a plurality of unmanned underwater vehicles (UUVs). The mothership transports the UUVs to and from the vicinity of an underwater region, releases the UUVs into the water, and facilitates recovery of the UUVs from the water. Each UUV can traverse an underwater region, generate sonar and image data associated with the underwater region, and transmit the sonar and image data through the water for receipt and re-transmission by the mothership. A docking system mounted partially onboard the mothership and partially onboard each UUV couples each UUV to the mothership and selectively releases each UUV into the underwater region. A guidance system mounted partially onboard the mothership and partially onboard each UUV guides each UUV back to the docking system from positions in the water.