78°s 
74°s 
70°s 
164°W 
KEY TO ICE SYMBOLS 
172°w 
COVERAGE (CONCENTRATION) 
(Jie free 
(EEE) <01 (open water) 
SG] thru 0.4 (scattered ica) 
(LETT) 95 thru 07 croken ica) 
E158 thes 0.9 (close i) 
FEBE] 1.0 (consliated or ast ca) 
et 
My My 
ny =tenths of gush, brash, and block 
ny =tenths of small and medium floes 
ny=tenths of giant floes and field 
AGE 
A 
F dominant, % secondary 
Si=Swush = W=Winler ica 
Y=Young ice Pl==Polar ice 
Examples: we Wes 
* Gow, OPI" Ww 
Pa 
Puddles: dominant amount 
in tenths unless 
frozen of rotten 
F=Frozen R=Rotten 
Pd Pd Pd 
Examples: TER 
He Crack == Lead 
© Polynya 
ICE OF LAND ORIGIN 
[BOUNDARY ] A lcabergs=many (>20) 
—— Observed 
——— Estimated 
ZS leabdargs—lew (<20) 
@ Bargy bits and growlers (>20) 
THICKNESS AND SNOW COVER 
Thickness; u where n= feat and inches 
‘Snow cover: = 
n=depth to nearest inch 
C=ice uniformly snow covered 
D=snow cover in drifts 
O=eno snow cover present 
TOPOGRAPHY 
AA Rafted ce 
NM Ridged ice 
OOO Hummocks 
Extent: H=very extensive 
L=few present 
When no entry appears beneath 
symbol extent is moderate 
Examples: 
~ =very extensive ridging 
AA =moderate rating 
= © © Limit of observed dats 2 Bergy bils and growlers (<20) oe mere heromncexs 
172°W 
180° 
180° 
86 
172°E 
164°E 
172°E 
FIGURE 56. RESULTS OF AERIAL ICE RECONNAISSANCE, ROSS SEA 
156°E 
LEADS AND 
POLYNYI 
OUTER PACK’ ; 
BOUNDARY 
