

FOREWORD 



This glossary is designed for use in the Hydrographic Office 

 training prograxns which include instruction in the preparation of 

 bottona sediment charts. It defines bottom type notations given on 

 navigation charts in an effort to msike more uniform their interpreta- 

 tion and use in bottom sediment charts produced by this Office. In 

 addition, the glossary should assist researchers in comparing and 

 evaluating notations and symbols which appear on navigation and bottom 

 sediment charts. 



Rear Admi^l, U. S. Navy 

 Hydrographer 



