1. A method for controlling a system that includes a plurality of unmanned vehicles defined as a fleet, wherein each of the plurality of unmanned vehicles comprises an aerohydrodynamic vehicle body wherein at least a portion of the vehicle body comprises at least one enclosed hull that defines at least one enclosed interior compartment capable of pressurization, wherein the vehicle body includes a center wing characterized by a leading edge, a trailing edge, a port edge, a starboard edge, an upper surface, and a lower surface, and a pair of opposing sponsons characterized by a stepped hull design, wherein each sponson comprises a proximal wall positioned adjacent the wing and a distal wall positioned opposite the proximal wall, and wherein the sponsons are integrally coupled to the port and starboard edges of the wing, respectively, such that the proximal walls of the sponsons and the lower surface of the wing define therebetween a tunnel, and a propulsion system, a ballast system, a center of gravity system, a pressurization system, at least one control surface system, a navigation control system, a sensor system, an on-board mission control system, and at least one power supply each carried by a respective portion of the vehicle body; a network; and a first off-board control system in data communication with the respective on-board control system of each of the unmanned vehicles in the fleet via the network; the method comprising: creating, using the first off-board control system, a mission directive comprising at least one of remote-control operational instructions and semi-autonomous operational instructions to control operation of the respective on-board mission control system of each of the unmanned vehicles in the fleet; receiving, using the on-board control system of a first one of the plurality of unmanned vehicles in the fleet, defined as a receiving vehicle, the mission directive that further comprises an objective and a transit route for the receiving vehicle, wherein the transit route comprises at least two operations selected from the group comprising an air glide operation, a water surface operation, and a sub-surface operation, processing the mission directive to selectively operate the vehicle body of the receiving vehicle in air, on a substantially planar water surface, and while submerged in water by some combination of providing, using the power supply of the receiving vehicle, power to the propulsion system, the ballast system, the center of gravity system, the pressurization system, the at least one control surface system, the navigation control system, the sensor system, and the on-board mission control system of the receiving vehicle, propelling the receiving vehicle using the propulsion system of the receiving vehicle, varying, using the ballast system of the receiving vehicle, a buoyancy of the receiving vehicle, varying, using the center of gravity system of the receiving vehicle, a center of gravity of the receiving vehicle, varying, using the pressurization system of the receiving vehicle, a pressure within the at least one enclosed interior compartment of the receiving vehicle, maneuvering the receiving vehicle using the at least one control surface system of the receiving vehicle, controlling, using the navigation control system of the receiving vehicle, a speed, an orientation, and a direction of travel of the receiving vehicle, transmitting environmental data using a plurality of environmental sensors of the sensor system of the receiving vehicle, transmitting operational data using a plurality of operational sensors of the sensor system of the receiving vehicle, receiving, using a rules engine of the on-board mission control system of the receiving vehicle, the environmental data and the operational data and issuing autonomous operational instructions retrieved from an on-board data store to control operation of the propulsion system, the ballast system, the center of gravity system, the pressurization system, the at least one control surface system, and the navigation control system of the receiving vehicle, wherein the autonomous operational instructions comprise air control instructions, marine control instructions, and submarine control instructions, and executing, using the propulsion system, the ballast system, the center of gravity system, the pressurization system, the at least one control surface system, the navigation control system, and the on-board mission control system of the receiving vehicle, in combination, the air control instructions to operate the vehicle body of the receiving vehicle in the air, the marine control instructions to operate the vehicle body of the receiving vehicle on the surface of water, and the submarine control instructions to operate the vehicle body of the receiving vehicle below the surface of water.