Design Information 



A coastal engineer charged with designing an FTB has two main 

 concerns requiring design data: 



1. For a given incident wave height or wave energy spectrum, what will 

 the transmitted wave height or wave energy spectrum be after 

 propagating through the FTB? 



2. For a given incident wave height or wave energy spectrum, how big 

 will the mooring loads be? 



Other concerns include the effect of ice on the FTB and its mooring 

 system, the drag force on the FTB due to currents (Bishop 1981), and 

 continued flotation of the breakwater (Bishop 1982). 



An earlier Goodyear FTB field monitoring program was 

 undertaken in Narragansett Bay, Rhode Island (Kowalski and Candle 1976) 

 but no useful design information was ever published. The Goodyear FTB 

 design information that does exist is the result of model tests 

 conducted in wave flumes, some at prototype scale. 



Instrumentation 



Waves were measured with four pressure transducers (Viatran 

 Corporation, Model 218), two on each side of the 64 x 9 module (129 m x 

 19 m) FTB test section (Figure 4). The pressure transducers were 



69 



