Vessel and method of operating vessel for marine operations

A vessel for marine operations including a vessel body and a plurality of fully submerged hydrofoils pivotly connected to the vessel body configured to adjust the amounts and directions of lift and minimize hydrodynamic drag and provide attitude control on the vessel body, characterized in:

• one or more hulls provided in the vessel body comprising air and water vents for buoyancy control,
• one or more propulsion motors for providing thrust with propellers respectively positioned in the bottom end of one or more of the plurality of fully submerged hydrofoils,
• a stabilization system including sensors and actuators for dynamically maintaining balance and control through adjusting angle of the hydrofoils,
• wherein the vessel is operable in three distinct modes:
• a first mode on the water surface at variable speeds with the one or more hulls partially filled with water,
• a second mode, foiling above the water surface at higher speeds, sustained by lift generated by the hydrofoils with the hull(s) drained of water,
• a third mode, submerged below the water surface at lower speeds with the one or more hulls filled with water,
• and wherein transitions between these modes are achieved by at least dynamically adjusting the angles of the hydrofoils and adjusting the speed of the vessel to control the passing of air and water in and out of said water and air vents.