263 273 



303 313 323 



28 24 20 16 12 8 4 SW SSW S SSE 



BREAKER HEIGHT, H b - FEET 233 223 213 203 193 183 173 163 153 143 



DIRECTION OF WAVES -TRUE AZIMUTH 



PERIOD, T- SECONDS 



WAVE CHARACTERISTICS FROM FORECAST:- 

 H„-IO FT. , T=9.5 SEC, AZIMUTH. 202.5 DEC. 

 DETERMINE SURF CHARACTERISTICS WHEN 

 THE STAGE OF TIDE IS +3.5 FT. 



200 400 600 800 1000 1200 1400 1600 

 DISTANCE FROM EDGE OF STI LLWATER, X fc -FEET 



OF THE CURVE H„/T«O.II AND AZI- 

 MUTH OF 202.5 DEG. DRAW HORIZONTAL 

 LINE TO CURVE OF H„=IOFT. ON CHART 

 C; THEREFORE, BREAKER HEIGHT, H = 1UFT. TIDE OF + 3.5 FT.,X„=725 FT. 



FROM CHART : FOR T=9.5 SEC. AND H^ 

 ■II. I FT., DEPTH AT BREAKER , d b = 13.9 FT. 

 FROM CHART E ! FOR Ho/T'=O.II AND 

 AZIMUTH OF 202.5 DEG. , 0C,,= 12.5 DEG. 

 FROM CHART F ! FOR <!„■ 13.9 FT. AND A 



SURF FORECASTING CHART 



FOR 

 LAS PULGAS BEACH 



FIGURE I 

 24 



