Column 17 is the shoaling coefficient Kg2 related to the values of 



(To) /da (Column 16). 



Column 18 is H = H^ x Kg2 (product of Columns 13 and 17) 

 Column 19 is obtained by using Equation 3-38 



N = — = ' , where \ = R/Vp = — = 1.38 hours or 4,970 seconds. 

 T/ Tj P 26 



Column 20 is H = 0.707 H /log N', H is from Column 18. 

 max ^e 



After one line of computations across is completed, the next line is 

 begun, using F = F' + AF <. 137 where F' is from Column 14 of the 

 preceding completed line. For example, consider the line corresponding to 

 X = 40 being completed. Then the computation for the next line X = 35 

 is as follows: 



Fg = 66.4 from line X = 40, Column 14. 



Fg = 66.4 + 5 = 71.4 nautical miles for line X = 35 . 



Column 6 

 Compute 



Column 7, H^ = 5.08 \ll\A'= 42.9 feet. 



Column 8, T^ = 2.13 \/42.9~ = 14.0 seconds . 



To (14)^ 



Column 9, =^ = = 1.73. 



dj, 113 



Column 10, K = 0.924 (Table 3-3) for values of J- = 1.73. 



304 HK (304 (42.9) (0.924) ^^^, 

 Column 11, A = — _ = — rr7zzz~ = 0.943. 



(d.p)^ 



(113)^ 



Column 12, lO = 0.89 (from Figure 3-35) for values of =^ == 1.73 and 



Column 13, 

 Column 14, 



A = 0.943. 

 H^ = H^ Ky = 42.9 (0.89) = 38.2 feet . 



%- 



= 56.6 nautical miles . 



3-68 



