MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...

These too are subjected to a less powerful wave regime (Drew, 2009). An example of anearshore device is the OSPREY (Clément, 2002).2.1.3 OffshoreOffshore devices are installed in deep water, approximately 40 meters or deeper. The higherenergy waves are offshore, however, these devices are more expensive to deploy andmaintain (Falcão, 2010). Since these devices also experience the higher energy waves, theyalso are most subjected to destructive conditions (Drew, 2009). Examples of offshoredevices include the Archimedes Wave Swing and Pelamis (Clément, 2002).2.2 Mode of MotionMode of motion describes which and how many degrees of freedom the device has. Thereare six potential degrees of freedom; the first three listed are translational and the latter threeare rotational, as seen in Figure 2.1:SurgeSwayHeaveRollPitch2y5z6341x Yaw Figure 2.1 Modes of Motion (Newman, 1977)22