16 



5. It is suggested that a number of recorders be built and installed 

 on many ships in order to provide statistical information on the motions, and 

 possibly on the strains and pressures, encountered under various operating 

 conditions. This type of information would be valuable in diverse 

 applications . 



6. It is recommended that a project be set up to develop and build a 

 statistical counter device, similar to that described in Reference 3, which 

 would tabulate the variations of rolling and pitching angle, etc., according 

 to the number of cycles of given magnitudes that have occurred. This device 

 would be utilized as an attachment to the TMB automatic ship's motion recorder. 



ACKNOWLEDGMENT 



Most of the success of the development work is due to the persistent 



efforts of the Schaevitz Engineering Co. Much of the laboratory and field 



work carried out in connection with the evaluation of this equipment was done 



by Mr Q.R. Robinson of the TMB Vibrations Division. The project was accom- 

 plished under the direction of the author. 



