AN APPRECIATION 



With the development of navigation of the sea and air, the need 

 of weather observations from the oceans is constantly increasing. 

 Immediate communication of the observations by radio to meteoro- 

 logical centers has opened a vast field of daily service. For ocean 

 M^eather studies and summaries, the more detailed reports which 

 are forwarded by mail at the end of the voyage are becoming in- 

 creasingly important. In all of this work the mariner is giving 

 full cooperation to the meteorologist. 



Having these greater opportunities for service in mind, the 

 Weather Bureau issues this sixth edition of Instructions to Marine 

 Meteorological Observers. 



In issuing this new edition, the Weather Bureau extends its sincere 

 thanks to the masters and officers who contribute so effectively to the 

 maintenance of the ocean weather service. 



W. R. Gregg, Chief of Bureau. 



