NOVELTY - The submersible module (10) has a base for attaching the equipment and a scour plate (16) leading on to a vent plate (18). The scour plate diverts the boundary layer component of the water flow adjacent the water bed and over the module so as to accelerate the boundary layer water flow over the module, resulting in generation of hydrodynamic anchoring force. The vent plate vents a portion of the water flow through the module during descent of the module towards the water bed during the module installation. The equipment may be a detachable turbine module (30).    USE - Submersible module for anchoring equipment, such as tidal turbine structure including vertical axis underwater turbines or detachable turbine modules or other renewable energy device, with respect to water flow passing over water bed.    ADVANTAGE - The boundary layer fairing including the scour plates combined with the vent plates reduces effect of the boundary layer by accelerating the flow near to the water bend, improving inflow conditions to the turbine units. Very high yield or power output per unit area of water is possible since the module, the fairing and the buoyancy towers reduce turbulent forces, allowing modules to be located close together. The modules carry the large heavy transformers on-board to step-up the power generated by the turbines to the most suitable specification for transmission and connection to the national grid. The modules enable simultaneous installation of turbines or similar renewable devices at the same time, resulting in money savings. Commissioning and testing are performed along side or in-dock, improving health and safety while reducing likelihood of failures during service. The array of modules can be deployed rapidly from the shipyard by tugs available commonly at reasonable day rates. The array is self-installing as it only needs the most limited support from the tugs. The array can be installed rapidly within minutes using the ballasting system, allowing for greater flexibility and reliability in scheduling of installation which lead to time and cost savings at sea. The module is self-supporting and is equally stable on both the water bed and the water surface and does not require pre-laying of mooring or transmission lines, eliminating expensive drilling and cable lay vessels. The submersible modules also allow the structure to be tailored to individual sites, in terms of number of units to be connected together, reducing unit costs. Improved reliability is achieved since all major electrical and mechanical parts are contained within a non-corrosive airtight environment. Rapid recovery of the turbine modules can be attained since the modules detach themselves from the submersible modules and rise by buoyancy to the water surface. The detached turbine modules can be towed ashore to ensure maintenance in a safer environment at reduced cost. The submersible modules present negligible visible impact since the modules are located on the water beds. The scour plates reduce scouring of the seabed, reducing effects on the environment. The boundary layer fairing creates a sheltered environment that allows aquatic life to flourish, improving aquatic life. Electromagnetic signatures are controlled using special hull claddings with reduced corrosion levels. The materials for the claddings are carefully selected to reduce requirement for palliatives. Strong tidal mixing provides nourishment needed for the whole aquatic food chain. Decommissioning costs are reduced since the submersible modules can be rapidly ballasted to bring these to the surface, disconnected from the electrical grid connection, and towed back to port for refit or dismantling. The main hull supports different types of renewable energy devices, due to flexibility of its payload capacity where the pressure hull provides a corrosive-free environment. All major assembly and maintenance work is performed on-shore in a safer dock yard environment, improving health and safety. All operations may be performed remotely from an on-shore support ship or by remote operated vehicles utilizing hydroways, eliminating requirement for divers to aid in installation. Risk from ships navigating in and around the installation site is lowered, due to clearance draft provided for all shipping in the area which allows the ship to pass safely over the top of the system.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an array of submersible modules; and    (2) a method of installing anchoring equipment with respect to a water flow passing over a water bed.    DESCRIPTION OF DRAWING(S) - The drawing shows the perspective view of an array of submersible modules with a vertical axis turbine.    Submersible module (10)    Scour plate (16)    Vent plate (18)    Main hull plate (20)    Detachable turbine module (30)