14.1.5 International Weather

Question 1

1. Can you deviate from your oceanic route for weather without attempting to get a deviation clearance?

Answer 1

(Atlantic Hi/Lo 1/2, Tab 2, mid panel)
• No, you must attempt to get a deviation clearance. If you cannot obtain the deviation clearance, you can deviate and obtain a deviation clearance at the earliest possible time.

Question 2

2. (EXHIBIT 4) What does the highlighted field represent, on the METAR at UHHH?

Answer 2

UHHH 031900Z 01007MPS CAVOK M07.M17 Q0998 NOSIG

• Wind 010 At 7 Meters Per Second, (multiply by two, gives you 14 KNOTS)

Question 3

3. (EXHIBIT 4) What does the highlighted field represent, on the METAR at UHHH?

Answer 3

UHHH 031900Z 01007MPS CAVOK M07.M17 Q0998 NOSIG

• Ceiling And Visibility OK

Question 4

4. (EXHIBIT 4) What does the highlighted field represent, on the METAR at UHHH?

Answer 4

UHHH 031900Z 01007MPS CAVOK M07.M17 Q0998 NOSIG

• No Significant Change in the next two hours.

Question 5

5. (EXHIBIT 4) Your ETA for EHAM is 0530Z. What is your expected wind, visibility and ceiling?

Answer 5

TAF EHAM 031647Z 0318/0424 VRB03KT CAVOK
BECMG 0318/0321 07006K
TPROB30TEMPO 0320/0323 7000 -RA BKN040
BECMG 0404/0407 04012KT 6000 BKN008
PROB40
TEMPO 0405/0411 4000 -RA
BECMG 0410/0412 9999 NSW SCT015 BKN020
TEMPO 0411/0419 7000 –RA

Question 6

6. (EXHIBIT 5) Decipher the weather in area “A” of the weather chart.

Answer 6

(GOM, Ch 4)

• Area of moderate to severe turbulence from FL330 to below FL250.

Question 7

7. (EXHIBIT 5) Decipher the weather in area “B” of the weather chart.

Answer 7

(GOM, Ch 4)
• Isolated imbedded CB with tops to FL360 and bases below FL250
• Occasional imbedded CB with tops to FL370 and bases below FL250.
• Jetsetream with a 120 knot core velocity at FL330.
• Jetstream with a 100 knot core velocity at FL380.
• Area of moderate turbulence from FL360 to below FL250.
• Tropopause height of FL500

Question 8

8. (EXHIBIT 5) Decipher the weather in area “C” of the weather chart.

Answer 8

(GOM, Ch 4)
• Jetstream with a 90 knot core velocity at FL290.
• Area of moderate turbulence from FL270 to below FL250.
• Tropopause height of FL340.
• Highest height of the tropopause in the depicted grid of FL360

Question 9

9. (EXHIBIT 5) Decipher the weather in area “D” of the weather chart.

Answer 9

(GOM, Ch 4)
• Lowest Height of the Tropopause in the depicted grid of FL200.
• Area of moderate turbulence below from FL360 to below FL250.

Question 10

10. What is the VOLMET frequency found for Amsterdam and where is it found?

Answer 10

(Europe (HI) 1/2)

• 126.2