4.0 A very flat sea or a confused one with much wind chop 

 results in inaccurate directions „ 



5o The relative position of the sun may cause an observer 

 to fail to identify a swell „ 



The advantages of the device are as follovj'S: 



lo The direction is obtained visually and directly, 



2« For well-defined wave crests average errors of about 

 five or six degrees may be expected. 



3o It is simple to operate. 



Uo Its cost is nominal assuming possession of a transito 



ANNOUNCEMENT OF PUBLICATIONS 



The :feach Erosion Board announces the publication of Technical 

 Memorandum Noo 13, "Longshore Current Observations in Southern Calif- 

 ornia," and Technical Memorandum No. 14, "Report on ^ach Study in 

 the Yiclnity of Mugu Lagoon, California »" Copies are being mailed 

 to those individuals and institutions on. the mailing list for techni- 

 cal publications o 



The memoranda are contributions from the Scripps Institution of 

 Oceanography and report the results of shore studies conducted along 

 the coast of California . 



Investigations of longshore currents measured in the surf zone 

 at frequent intervals throughout a year at a series of stations along 

 the southern California Coast are described and discussed in Technical 

 Memorandum No. 13o The study indicates that dominant currents in the 

 area are to the south in response to the direction of approach of tV'" 

 principal wave trains, while north currents indicative of southern 

 hemisphere storms prevail during a large part of the summer and fall. 



Investigations to determine the relative stability of the beaches 

 and sand spits bordering Mugu Lagoon are reported in Technical Memo- 

 randum NOo 14, The effect of spring tides, high waves, and direction 

 of longshore transport of sand on the spits is discussed, 



A limited number of copies are available for distribution upon 

 request to the President, ^ach Erosion Board, Corps of Engineers, 

 5201 Little palls Road, No Wo, Washington 16, D. Co 



35 



