CH 13 THE WEATHER REPORTING SYSTEM
CH-14 THE WEATHER CODES
CH 15 PRESSURE MEASURING INSTRUMENTS
CH 17 VISUAL STORM WARNING SIGNALS
CH 18 SURFACE CURRENT ARABIAN SEA & BAY OF BENGAL
CH 19 CYCLOSTROPHIC FORCE
CH 20 COMPARISION BETWEEN A TROPICAL REVOLVING STORM
CH 21 STABILITY OF AIR
CH 22 ICE AT SEA
CH 23 THE INTERNATIONAL ICE PETROL
CH 24 AIRMASSES AND FRONTS
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