156°W 164°W 172°W 180° 172°E 164°E 156°E 
78s 7es 
76°s 76°s 
74°s 74°s 
72°s 72°s 
70°s 70°S 
POLYNY! 
SLUSH IN BELTS 
68°S 
KEY TO ICE SYMBOLS 
[COVERAGE (CONCENTRATION) (ace) THICKNESS AND SNOW COVER 
A 
eos 
[Jee tree === Thess: where n= {eet and inches 
SSSS 
FEE) <0. (open water) S=Sush = W= Winter ica Snow cover: SE 
i VerYoung ice PlesPolar ioe depth to nearest inch 
RS 01 ene 04 8 ica) Examples: aan ytte C=ice uniformly snow covered 
(LETT) 05 tow 0:7 coroken ice) : ene cit 
WATER FEATURES es SCE CONT EES 
x (waren FEATURES } 
EQ )028 tna 09 (close ce) Pa 
Puddles: dominant amount 
1.0 (comsolidated or fast ice) in tenths unless AA Ratted ice 
frozen or rotten WW Ridged ice 
FaFroen —- R=Rotten 
° OND Hummocks 
64°S Cn Pd Pd Pd 
7M My Examples: 3 Fe Extent: H=very extensive 
ny ==lenths of slush, brash, and block —wsee Crack Se Lead Loew present 
ni, =Kenths of small and medium floes O Polynya When no entry appears beneath 
Aymlenths of gisot floes and field symbol extent is moderate 
ICE_OF LAND ORIGIN Examples: 
(eounDaRr] A. lsoep—nan (3) A rey eee 28 OCTOBER 1960 
—— Observed icedergu—few (< = ft 
——— Estimated ‘a: Bergy bits and growlers (>20) AA =moderate salting 
200 ~ few hummecks 
* © © Limit of observed data = 2 Bergy bits and growlers (<20) 
172°E 
FIGURE 58. RESULTS OF AERIAL ICE RECONNAISSANCE, ROSS SEA 
88 
