Page:NATIONAL INTELLIGENCE SURVEY 18; CZECHOSLOVAKIA; MILITARY GEOGRAPHY CIA-RDP01-00707R000200110011-1.pdf/21

APPROVED FOR RELEASE: 2009/06/16: CIA-RDP01-00707R000200110011-1

FIGURE 17. Bratislava, the capital of the Slovak Socialist Republic on the navigable Danube River, is a mixture of old and new. The old castle in the right background is a famous landmark of the Middle Ages, while the new Technical University in the foreground symbolizes entry into the 20th Century. (U/OU)

period is from early November through March, when migratory lows and frontal systems moving through the approaches often produce weather conditions generally hazardous to flying. These migratory systems occur slightly more frequently and are more intense in the northwest than in the southeast.

In all approaches, mean cloudiness is at a maximum, 60% to 80%, in November through February and at a minimum, 40% to 70%, in May through September. Cloudiest conditions occur in the north and west and over the mountains in the south and east. Least cloudiness occurs in the south near the plains of Hungary. Thunderstorms are most frequent in May through August, when they occur on 2 to 8 days per month, and are least frequent in October through March, when they seldom occur. Moderate to severe turbulence is common in thunderstorms, along frontal zones, and over mountain ridges. Moderate to severe aircraft icing may be expected in frontal cloudiness in winter when the freezing level is near the surface, and in convective clouds above about 12,000 feet in summer. Upper winds are predominantly westerly below about 50,000 feet all year, and mean

FIGURE 18. Bratislava strategic area (C)

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APPROVED FOR RELEASE: 2009/06/16: CIA-RDP01-00707R000200110011-1