SYMBOLS AND DEFINITIONS — Continued 



p(x) probability density function (dimensionless) 



q air discharge (cubic feet per second) 



r radius of gyration (feet) 



S unit surface element (square feet) 



SG specific gravity of sand (dimensionless) 



S-(f) incident wave spectrum (square feet per second) 



S spectrum of relative drag power (foot-pounds per second) 



S spectrum of relative velocities (feet per second) 



S t (f) transmission wave spectrum (square feet per second) 



S spectrum of horizontal water particle velocities (feet per 

 second) 



S (f) spectrum of wave power (foot-pounds per second) 



S radiation stress due to waves in direction of wave travel 

 (pounds per square foot) 



S* net radiation stress (pounds per square foot) 



S spectrum of surface elevations (feet) 



S(io) ocean wave spectrum (square feet per second) 



S(w-) incident wave spectrum (square feet per second) 



s tethered float spacing along wave crest (feet) • 

 •unit length of anchor line (feet) 



T tension in mooring line (pounds) 

 •wave period (seconds) 



T^ hydrodynamic effect on roll (pounds) 



T^ natural period of heaving (seconds) 



T^(t) arbitrary mooring line tension (pounds) 



T n natural period of oscillation (seconds) 



T i peak period of spectrum (seconds) 



T r natural period of rolling (seconds) 



20 



