A marine hydro power technology is a hydro power technology that describes how to combine hydro power units, a hydroelectric energy transformation and oceans.
A marine current energy technology is a marine hydro power technology that describes how to combine marine current energy converting units in marine current energy transformations.
A marine tidal energy technology is a marine hydro power technology that describes how to combine marine tidal energy converting units in marine tidal energy transformations.
A marine wave energy technology is a marine hydro power technology that describes how to combine marine wave energy converting units in marine wave energy transformations.