Low- frequency predicted sway motion and resonance are shown in 

 Figure 22 for MLLW, +5.33 feet, +10 feet, and +15 feet tide heights. 



+TIDE HEIGHT = +15.0 FEET 

 ATIDE HEIGHT = +10.0 FEET 

 ©TIDE HEIGHT = +5.33 FEET 

 □TIDE HEIGHT = 0.0 FEET (MLLW) 



25 20 



PERIOD (S) 



Figure 22. Theoretically predicted long -period sway response; 

 Friday Harbor breakwater. 



48 



