The project department monitors and controls the whole process of breakwater enrockment costruction by field observing instruments buried in sand soft nappe.
It pours powerfully out of the lagoon, driving the turbines in the breakwater in the opposite direction and again generating thousands of megawatts of electricity.
The breakwater will contain sixteen hydro turbines, and as the tide rises, water rushes through the breakwater, activating the turbines, which turn a generator to produce electricity.
It was just a short swim around breakwaters which mark the border up one side and then down the other to reach Ceuta a Spanish government spokesman said.
The town itself seems to be sliding downhill in a basin of hills, all slipping seaward into Stymouth harbour, which is surrounded by quays and the outer breakwater.