FIGURE 13.3 WaveRoller wave energy farm installation in Peniche, Portugal. (Adapted
from “Wave power,” Wikipedia, the free encyclopedia, 2013.)
FIGURE 13.4 Wave Dragon seen from reflector. (Adapted from “Wave power,” Wikipedia,
the free encyclopedia, 2013.)
Sea level
Current
Seabed
FIGURE 13.5 A horizontal-axis hydrokinetic rotating device, tidal turbine. (Adapted from
“How hydrokinetic energy works?” Union of Concerned Scientists, 1–5, 2012.)