SECT, nj 



Fig. 6. Arrows give the direction of maximum flood stream; numbers on full lines give 

 amplitude of tidal currents at springs in knots in the Irish Sea. (After Bowden. 1955, 

 Fig. 16. By courtesy of the Controller of H.M. Stationery Office.) 



existing tidal charts these types of results are evaluated. To complete the in- 

 formation which may be available on tides in the open sea, it is clearly desirable 

 to use observations of tidal currents. Proudman and Doodson (1924) developed 

 a method and applied it to the North Sea. Later on, Thorade (1935) applied it 

 to the current observations by Meteor in the South Atlantic. 



It is important to bear in mind that the draughting of tidal charts based 

 solely on coastal data becomes more and more hypothetical with increasing 

 width of the ocean. This may be the reason that, in the open ocean, most of the 



