FOREWORD 



The Hydrographic Office, aware of the need for improved 

 instrumentation in conducting hydrographic and oceanographic 

 surveys, develops, tests, and evaluates new oceanographic 

 instrumentso The Electric Wave Staff (Hydrographic Office 

 Model Mark I) is the first in a series of wave recorders 

 developed and tested for deep-sea worko Comments are 

 welcome on the operational value of this instrument « 



C H B. COCHRAN 

 >*JJaptain, U, S. Navy 

 Hydrog raphe r 



E3 c3 



