156°W 164°W 172°W 180° 172°E 164°E 
156°E 
° 
8 
78°s 78°s 
Mc MURDO 
SOUND 
Oo. 
76°s 76°S 
MANY CRACKS IN ALL 
AGE WTR— S_ 
c 
74°s 74°s 
72°s 72°s 
0. 
70°s 70°s 
°. 
68°s 68S 
KEY TO ICE SYMBOLS 
(COVERAGE (CONCENTRATION) AGE THICKNESS AND SNOW COVER - 
66s aes ui = 66s 
[Jee tree Fi dominant Fy aecondany HERDED: where n= feel and inches 
<0.1 (open water) Sl=Slush W=Winter ico 
YerYoung ice Pl=Polar ice 
S55) n=depth to nearest inch 
BSG KC) Examples a —vete.  C=zica uniformly snow covered 
tow, 40PI' W 
(ie: thru 0.7 (broken ice) Semen cover in drifts ‘ 
Sno. Show cover eezen 
B08 thru 09 (close ice) Pd 
= TOPOGRAPHY 
Puddles; dominant amount 
0 (consolidated of fast ice) in tenths unless AA Ratlted ice 
COVERAGE BY SIZE sea Sates ley 
3 FeFroren — Re=Rotten Onan Lips 
64°S Cn Pd Pd Pd & 
my My Examples: 3 Fs Extent: H=very extensive 
ny==tenths of slush, brash, and BIOCK tase Crack Se Lead Letew present 
n,=tenths of small and medium floes oO Polynya 
ny=tenths of gant floes and field 
TCE OF LAND ORIGIN ep 
A. [cedergs—many (> 20) 
2S A letar ev (2 irene lei Il OCTOBER I9S60 
— Estimated @ Bergy bils and growlers (>20) 
+ © © Limit of observed dats cx Bergy bils and rowers (<20) CPD =Few hummocks 
When no entry appears beneath 
symbol extent is moderate 
172°E 
FIGURE 54. RESULTS OF AERIAL ICE RECONNAISSANCE, ROSS SEA 
84 
a 
7 
