BIRDS EYE 2-71, 3-15 February 1971.
NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C
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BIRDS EYE 2-71 was a regularly scheduled Arctic Ocean ice reconnaissance mission covering areas east and west of Greeland between 3 and 15 February 1971. Ice observations were taken under daylight, twilight, or moonlight conditions. Poor weather andor illumination restricted visibility to 4 km or less over 50 percent of the tracks. Author
- Snow, Ice and Permafrost