REDUCTION OF CURRENT RECORDS 
Form 461 
Rev. Sept., 1931 
DEPARTMENT OF COMMERCE 
u. S. COAST AND GEODETIC SURVEY 
CURRENTS: FLOOD, EBB, AND SLACK 
Lat. 32 
Channel west of Onslow Island, Savannah River, Gae Long, 81 
Station: 
59 
° 08 .8°N 
° 08.4'h 
Acc. No. T1863 _ Party of 
Times referred to at 
E. F. Hicks, Jre 
Currents at Savannah River Entrance 
Time Meridians: (This Sta. 
Velocities corrected tor poy. 
Plotted on Chart No. 440 _ Station No. 25 
)_75° W 
Gberrenee-,, Savannah River Entrance f = 2200/2.05 = 0.98 gsi) 75° W 
DATE TIME OF— CURRENT INTERVALS STR.OF FLOOD] STR. OF EBB 
Soo Lob ea ea ee 
mo. d a. he he A h. h. he A. he i) knols 0 knots 
May 14 | (77)! 9.5 (20) 
17.5 |1969 | 22-5 | 13.6 23 | 1.1] 210 | 1.4 
15 605 804 | 1025 207 21.1 Oe6 | 209 | 125 
1820 |2004 | 23.0 25 
Pole 16 7TeO | 869 |11.0 | 365 22 | 0.6/ 210 | 12.4 
Average 18.5 | 20.6 | 23-5 | 1 19_| 1,0} 212 | 123 
Depth 17 | 728 305 [ 209 1.3 
7 feet 130_!| 4,9/1259 | 8.4 
Divisars 6 6 6 6 
| Means 22 | 0.82| 210 | 1.40 
11,3Be 
Savannah River mtrance for |jcomparison 
+ + + + 
May 14 5e7 | 902 2.0 | 003 1.8 
1569 |18,1 | 22.0 | 1207 | 126 8 | Oe5 | Oe9 Qokt 
15 4.5 | 6o4 | 9.7! 163} 2.0 | 2.0 | 0,8 |! 1,4 1.7 2e3_ 
16.6 |1868 | 22.6 | 13.4 | 14 166 0.4 ! 1.0 2el 2035 
16 bYY4 To2 | 1002 2-0 | 128 1-7 | 0.8 | 1-5 1.6 202 
| 1704 19.6 | 2302 | 1401] 1.1 | 1.0 | 0.3 | 1.0 W250) 2a 
17 6.0 2e7{ 1-8 | 0.3 200 
ae Suma 927 [1061 | Sel | 626 11.3 
! 6 § 6 6 6 Gia 
z | Means 1.62 | 1.68 | 0.52 | 1.10 1.8 2022 
Greenwiph intefvals, |referbnce station 8411 10.22 | 1,72 | 4-86 | 
ST # this sta 973 111090 | 2024 | 5.96 | 
Mean cutrent hour (MCH) 12.) 
| 
Velocity reduction 
Best knowm mean current velocity at reference stationesceccccesscecee 2000 knots 
Velocity for observationsel period at reference sta. 4(1.88 + 2022) = 2.05 * 
Reduction factor for tidal currentecssecscossoosees 2090/2005 = 0.93 . 
Observed tidal current at this station = (0.82 + 1.4C) = 1.11 knots 
Corrected tidal current = 1.11 x 0.98 =1,09 " 
Nontidal current = $(0.82 = 1.40) 2-0.29 " 
Corrected flood current = 1.09 - 0.29 = 0.80c * 
Corrected ebb current «= 1.09 + 0.29 = 1.330 * 
FIGURE 30.—Form 451, Flood, ebb, and slack referred to currents. 
878447 ° —50. 
