TIDAL CURRENTS 



Red arrows and figures denote the observed direction 

 and average velocity in knots of the current at time stated 

 at bottom of chart. 



Predicted times of high and low waters for Boston 

 aregiven in the Tide Tabies. Atlantic Ocean, published 

 annually by the U. S. Coast and Geodetic Survey. 



.--.--°°'S'""V:^' 



-. V' 



'/ 5 





■ /o.9 



30 /aiAo/ns _ 0,7 



I ' .0.7' , ■, V. '■ 



^ 



0.3 / ' 



b 0.8 



a /athorns 1 .0 



G ,io(»> 



.y 



,o - 





'^■_. .--- \" 



Fig. 27 Currents 4 hours after Greenwich transit (15 minutes after high water at Boston), 



