6-57. Cold currents ordinarily are horizontally 

 stable but less stable vertically as they 

 flow into warmer waters; and warm currents 

 are 



1. always horizontally stable and verti- 

 cally unstable 



2. normally vertically stable and less 

 stable horizontally 



3. normally stable both horizontally and 

 vertically 



4. normally unstable both horizontally 

 and vertically 



6-58. How is the wave train direction indicated 

 on a sea condition analysis chart? 



1. By solid isopleths 



2. By isohalines 



3. By dashed isopleths 



4 . By arrows 



Learning Objective: Relative to 

 radiological fallout (RADFO) , 

 recognize factors upon which the 

 forecasts are based and the use 

 of the RADFO diagram. 



6-59. Which of the following factors necessary 

 for the prediction of the fallout area 

 can be available before detonation of a 

 nuclear weapon? 



1. Yield of the weapon 



2. Location of the burst 



3. Atmospheric wind structure 



4. Time of day and season of the year 



6-60. A black elliptical contour line on the 



RADFO diagram indicates the limits of the 



1. potentially hazardous area when a low- 

 yield explosion occurs at surface 

 zero (SZ) 



2. potentially hazardous area when a 

 high-yield explosion occurs at SZ 



3. area in which fallout occurs 

 simultaneously when a low-yield 

 explosion occurs at SZ 



4. area in which fallout occurs 

 simultaneously when a high-yield 

 explosion occurs at SZ 



Learning Objective: Recognize the 

 use and functions of the SKEW-T 

 Diagram and other various charts 

 available within a weather office. 



6-61. The level at which a parcel of air becomes 

 saturated when lifted dry adiabatically is 

 called the 



1. LCL 



2. LFC 



3. CCL 



4. CTL 



6-62. The level at which a parcel of air, if 



heated sufficiently from below, will rise 

 adiabatically until it is just saturated 

 describes the 



1. LCL 



2. CCL 



3. LFC 



4. CTL 



In items 6-63 through 6-65, select from column B 

 the information depicted on each type of chart 

 listed in column A. 



Charts 



6-63. Prognostic 

 6-64. Radar summary 

 6-65. Weather depiction 



B. Information 



1. Distribution of 

 echoes from 

 hourly radar 

 reports 



2. Projections of 

 basic charted 

 information 

 into the future 



3. Distribution of 

 clouds from 

 satellite 

 pictures 



4. Outlines of 

 areas of signif- 

 icant weather 



38 



