164 



HYDROGRAPHIC MANUAL 



5-87 Standard abbreviations. 



5-88 Abbreviations for bottom character- 

 istics. — The following abbreviations concern- 

 ing quality of the bottom are taken from 

 Section S of Chart No. 1, Nautical Chart 

 Symbols and Abbreviations, December 1959 

 edition and shall be used to record data 

 obtained by bottom sampling. 



Abbreviati<m Term 



Grd Ground. 



S Sand. 



M Mud; Muddy. 



Oz Ooze. 



CI Clay. 



G Gravel. 



Sn Shingle. 



P Pebbles. 



St Stones. 



Rk; rky Rock; Rocky. 



Bids Boulders. 



Qz Quartz. 



Co Coral. 



Co Hd Coral Head. 



Vol Volcanic. 



Vol Ash Volcanic Ash. 



La Lava. 



Pm Pumice. 



Cn Cinders. 



Sh Shells. 



Oys Oysters. 



Ms Mussels. 



Spg Sponge. 



Wd Seaweed. 



Grs Grass. 



Gl Globigerina. 



fne Fine. 



crs Coarse. 



sft Soft. 



hrd Hard. 



stf Stiff. 



sml Small. 



Irg Large. 



stk Sticky. 



brk Broken. 



spk Speckled. 



gty Gritty. 



fly Flinty. 



glac Glacial. 



wh White. 



bk Black. 



vi Violet. 



bu Blue. 



gn Green. 



yl Yellow. 



or Orange. 



rd Red. 



br Brown. 



ch Chocolate. 



gy Gray. 



It Light. 



dk Dark. 



5-89 Page headings. — Appropriate en- 

 tries shall be made in full at the top of the 

 first and last record page of a day's work 

 and, if it is divided between two volumes, 

 on the last page of the first and the first 

 page of the second volume. The locality, 

 sublocality, date, and name or number of the 

 sounding vessel can be entered with rubber 

 stamps. The entries should be made on all 

 pages if this does not interfere with the 

 recording of more important data. 



The assigned day letter (see 5-35) shall 

 be entered at the top of every page in the 

 color used to identify the work of that unit 

 and in capital or lower case letters as 

 appropriate. 



The page headings should never be en- 

 tered in advance of the hydrography. 



5-90 Information at beginning of day's 

 work. — Certain information relative to per- 

 sonnel engaged, instruments used and their 

 adjustments, and other pertinent facts, 



