164°W 
KEY TO ICE SYMBOLS 
COVERAGE (CONCENTRATION) 
[Jie free 
<0.1 (open water) 
0.1 thru 0.4 (scattered ica) 
(ies thru 0.7 (broken ica) 
A108 thru 09 (close ice) 
iseceee 0 (consolidated or fast ice) 
Cn 
Ay. My My 
fn, =tenths of slush, brash, and block 
n,=lenths of small and medium floes 
fny=tenths of giant floes and field 
172°w 180° 172°E 
REFROZEN 
LEADS 
A we 
Sow 40yY 034 
ICE FREE 
LESS THAN ONE TENTH i 
BRASH - BLOCK 
(cE) 
A 
[THICKNESS “AND SNOW COVER] 
% dominant, % secondary 
St=Slush = W=Winter ice 
Y=Young ice Pl=Polar ice 
aan 0 
Bamples: So a0m' W 
WATER FEATURES 
Pd 
Puddles: dominant amount 
in tenths unless 
frozen or rotten 
F=Frozen R=Rotten 
_Pd Pd Pd 
Examples: FR 
Her Crock <= Lead 
© Polynya 
ICE OF LAND ORIGIN 
BOUNDARY 
—— Observed 
——— Estimated 
172°w 
FIGURE 62. RESULTS OF AERIAL ICE RECONNAISSANCE, ROSS SEA 
A Icebergs —many (>20) 
XQ Icebergs—few (<20) 
@ Bergy bits and growlers (>20) 
* © © Limit of observed data = Bergy bits and growlers (<20) 
Thickness: r where n= feet and inches 
‘Snow cover: = 
n=depth to nearest inch 
C=ice uniformly snow covered 
D=snow cover in drifts 
O=no snow cover present 
TOPOGRAPHY 
AA Ratted ice 
NW Ridged ice 
ONO Hummocks 
Extent; H=very extensive 
L=few present 
When no entry appears beneath 
symbol extent 1s moderate 
Examples: 
AA every extensive ridging 
AA =moderate rafting 
e000 
ates =few hummocks 
92 
164°E 
