40 U. S. COAST AND GEODETIC SURVEY 



Table 7. — Current Harmonic Constants, Atlantic Coast Lightships — Con. 



St. Johns Lightship 



369 days beginning December 23, 1933. Magnetic variation 1° east 



K,.. 



K2.. 



La.. 

 Mi.. 

 Mj. 

 Ms- 



M4-. 



Mo.. 

 Ms- 



N2.. 



O,.. 

 Pi.- 

 Qi-- 

 S,... 



62... 

 Mu2 

 6a-. 

 6sa. 



0.039 

 0.010 

 0.008 

 0.005 

 0.154 

 0.008 

 0.006 

 0.006 

 0.004 

 0.033 

 0.014 

 0.020 

 0.016 

 0.079 

 0.035 

 0.011 

 0.125 

 0.022 



134 

 173 

 116 

 211 

 144 

 136 

 130 



16 

 231 

 122 



51 

 131 



46 

 142 

 180 

 193 



99 

 225 



257 

 32 

 222 

 352 

 318 

 240 

 238 

 340 

 81 

 302 

 203 

 224 

 174 

 241 

 337 

 290 

 124 

 233 



Portland Lightship 



163 days beginning May 20, 1919. Magnetic variation 16° west 



Ml 

 Ml 

 M, 

 »'i 

 Nj 

 Oi 

 Sj. 



0.012 

 0.008 

 0.131 

 0.008 

 0.001 

 0.032 

 0.017 

 0.016 



318 

 7 

 244 

 36 

 320 

 248 

 157 

 315 



352 

 76 

 109 



71 

 300 

 180 



Pollock Rip Lightship (1911 Position) 

 87 days beginning June 20, 1911. Magnetic variation 14° west 



Ki. 



Ma 

 Ml 

 M« 

 Ms 

 Oj. 



S2.. 

 S4.. 



0.039 

 0.650 

 0.126 

 0.021 

 0.025 

 0.016 

 0.095 

 0.008 



149 

 135 

 225 

 303 

 96 

 69 

 164 

 354 



295 

 191 

 17 

 32 

 44 

 226 

 216 

 313 



Great Round Shoal Lightship 



87 days beginning June 20, 1911. Directions are true 



