156°W 164°W 172°w 180° 172°E 164°E 
F be 
McMURDO 
SOUND 
78°s 
78S 
76°s 
[COVERAGE (CONCENTRATION) [UCKNESSAND “SNOW COVER 
[ins tree Thich: whece ne feat and ince 
S388 
EEE} <0. (open wate) bemedaaeelit ol Y) 
YesYoung ca Pla Polar ice 
SSS3] 0.1 thew 0.4 (scattered ica) wa LN a, taremenaee oes 
(DTT) 2s toe 02 covet ie) Des snow cover in drifts 
GATTRWWEATINES One snow covet present 
é KS Sa on 03 (one ice) 4 
74°s Pate: onl met Crafocearir) 
FRR R]1 0 (comcta or test x) lafieathaveniens AA Ratted we 
frazen or rotten A Ridge ce 
= = 
= VoE On) 0010 Hummecis 
8 Pa Pa Pa 
Dany Eaamples: Fy Extent: H very extenuive 
sy mtontes of task, Beath, and Weck — se Crack maces Lad Latew present 
symtenths of small and medrum foes Ottm When no entry appears beneath 
nymtentts of giant Nort and held symbol extent 11 moderate 
TCE OF LAND ORIGIN Examples 
A lcobergs — many (>20) FON very extensive riding 
A leebergs—trw (<20) v 
x ——=— Estimated & Berey bis tod gromlers (>) aaa Tamia (ain 
72°s 5 = Lamit of observed dat. Bergy bits and prowiers (<20) AP? = lew hummocks 
70°s 
T72°w 180° 
78°s 
76°s 
0.5 thru 0.7 (breton ica) 
& KS 22 tea 09 (C00 ice) 
74°s Peden 
FRR) (comet wr tet ta) 
a 
ee 
,mtontna of wall nad mediom foes 
sym tentis of giant fers ond field symbol extent is moderate 
[ICE_OF LAND onIcIN Examples: 
A keatergs — many (>2) DOA a very extensive Gdging 
—— Oheret A lesterps—tew (<2) AA mimoderata rafting 
Cj ——— Litmuted & Berg bits and growters (>20) 
72°s #6 © Lint of chnered dota 2. Berry bt and protons (< 20) __°p2 tow hemmecks 
70°s 
172° 
Ww 
180° 
76s 
74s 
7238 
70° 
78°s 
TABULAR 
ICEBERG 
72°s 
70s 
172°E 164°E 
FIGURE 75. RESULTS OF SURFACE ICE RECONNAISSANCE, ROSS SEA 
105 
