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MET and NAV review

MET and NAV review. FINAL EXAM for sure study areas. PGF vs coriolis Virga, subsidence, isotach, isotherm, isobar, VDF Surface analysis vs prognostic chart Temperature effect on altimeter Stability - rising air and/or air masses Frontal weather, GFA validity, wind limits

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MET and NAV review

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  1. MET and NAV review

  2. FINAL EXAM for sure study areas • PGF vs coriolis • Virga, subsidence, isotach, isotherm, isobar, VDF • Surface analysis vs prognostic chart • Temperature effect on altimeter • Stability - rising air and/or air masses • Frontal weather, GFA validity, wind limits • Light & variable, freezing level • Vacuum driven heading indicator for navigation • Rhumb line, great circle, small circle, agonic line, deviation vs. variation • Compass errors – northerly turning, ANDS, quadrantal

  3. FINAL EXAM for sure study areas • Control zones, VFR minima, airspace classification, low level airspace, cruising altitudes, special VFR, transponder airspace • CDI, VOT check, VOR accuracy limits, ADF errors VOR and ADF orientation and use, ADF tuning • One VFR cross country – planning log, flight plan, Vnc chart completion, drift lines • Time zone adjustments, CFS use for planning, VHF frequencies, reserves, safety heights • ETA’s, Heading corrections, wind determination, revised ETA • Enroute GFA, TAF and METAR interpretation, PIREP interpretation, AIRMET interpretation

  4. One in Sixty Rule • 1:60 is the same as 1 degree

  5. ANABATIC WIND

  6. CLOUD CLASSIFICATION

  7. TEMPERATURE • The atmosphere is heated from below. • Temperature increase decreases density. • Advection: horizontal movement of air. Cold air becomes warmed by the ground as it moves over it • Convection: sun heats ground, ground heats the air, warmer and less dense pockets rise • Turbulence: vertical movement of air due to winds and convection • Compression: air sinks, compresses and heats (Chinooks, high pressure areas)

  8. Advection: horizontal movement of air. Cold air can be warmed by the ground as it moves over it

  9. Air Masses of North America • Continental Arctic: Ca • not in summer; low water content; warmed from below enroute, strong winds produce turbulence; heap clouds and snow showers; rarely in B.C. except as a cold-air invasion • (Continental Polar: Cp) • Maritime Arctic: Ma • starts as Ca that spends some time over the northern Pacific ocean; moist and unstable at high altitudes; stratocumulus and cumulus; pe/sn/-shra; in summer: northern lakes affect the air mass • Maritime Polar: Mp • more time spent over Pacific ocean; warmer in lower levels; more stable than Ma; orographic lifting makes rain west of mountains (Rockies) and dry air east of mountains; Summer: Tsra/Cb • Maritime Tropical: Mt • very warm and moist; Gulf of Mexico, Caribbean & south of 30°N; Winter: rarely at the surface N of Great lakes, but present at high altitudes; unstable when subject to Frontal lift; gives sn/ra/zr/icing and turbulence; FOG (east coast); Summer: shra/tsra

  10. Cumulus Stage: • Cloud driven upward by the latent heat as water vapour condenses • Strong updrafts prevail throughout. • Temperatures in cell are higher than outside temperature at the same level. • No precipitation while water and ice are suspended. • Mature Stage: • Heights may reach 60,000 feet • Updrafts up to 6,000 ft/min • As the water droplets grow large enough to fall, they drag air down with them. • Downdraft starts in the middle region of the cloud. • 15-20 minutes in duration; lightning, microburst, hail, wind shear. • Appearance of precipitation on the ground. • Dissipation stage: • downdraft spreads throughout the cell (except top) • gradual cessation of rainfall and the passing rain cools the lower regions • Anvil shape

  11. WEATHER TERMINOLOGY • SKY CONDITION • Clear: 0/8 • Few: 1/8 to 2/8 • Scattered: 3/8 to 4/8 • Broken: 5/8 to 7/8 • Overcast: 8/8 • IFR: less than 1000 ft &/or 3 miles • MVFR: 1000-3000 ft &/or 3-5 miles • VFR: greater than 3000 ft & better than 5

  12. ACTUAL LAPSE RATE • METAR CYKZ 251100Z 01009KT 7SM BKN040 BKN240 M08/M13 A2977 RMK SC4CI2 SLP095 • FCST BASED ON 251200 DATA VALID 251800 FOR USE 17-21 3000 6000 9000 12000 YYZ 0410 0506-13 9900-13 1909-17 6000 -13 650 -08 Lapse may be roughly 1o/1,000 ft 4000 cloud base -13 650 -08 Lapse roughly 1.5o/1,000 ft Note that the lowest layer of cloud is SC (cumulus) and likely formed from convection. Consider that any rising pockets had a dew point of -13 and therefore reached dew point and formed cloud at 4,000, before they got to the 6,000 foot altitude where temperature is actually measured

  13. GFA • Issued at 2330Z, 0530Z, 1130Z and 1730Z • Covers 12 hours with a 12 hour IFR outlook • Country covered with 7 GFA areas • Heights are feet above sea level • Section 3 of MET in AIP • Minimum of 5k to have speed be indicated • CU, TCU, CB and ACC will be indicated • Winds less than 20 k usually not shown • Amended GFA shows CCA, etc. in title box

  14. 5-8 Geostrophic Wind

  15. 5-11 Surface Friction

  16. FOG

  17. FOG • Fog is cloud (usually stratus) that is in contact with the ground. • forms in relatively stable air where the temperature to dew point spread is small, wind may be present • requires condensation nuclei • Usually needs a cooling process • Types of Fog: Radiation Advection Upslope Steam Frontal Ice

  18. Radiation Fog: clear night, light wind, high humidity, often a high pressure area.

  19. Advection Fog: warm moist air moving over colder land, horizontal movement, warm fronts/oceans, sometimes strong winds (+25kts)

  20. Upslope Fog

  21. Ice Fog: Byproduct of fuel burn in engine is water (as vapour)… added to cold crisp air. (sublimation: vapour to ice)

  22. Frontal Fog: vapour addition raises the dew point of the air mass under a warm front

  23. Steam fog: cold air moving over a warm surface

  24. FLIGHT PLANsee RAC section in AIM

  25. CYOO FLIGHT PLANNING LOG GOLF ME 11 FEB 71 :50 5.1 :30 2.2 71 1:20 7.3

  26. WAC

  27. LOW LEVEL AIRWAYS From 2,200’ AGL up to but not including 18,000’ ASL

  28. IFR & VFR SUMMARY

  29. KZ 2

  30. Practice Problem D Track = 189º Ground Speed = 122 kt Heading = 196º TAS = 106 kt Wind Direction = 332º Wind speed = 20 kt 106 kt 106 kt 122 kt

  31. Xwind & CRFI

  32. PQ 1 Obstacles, Arcal, ATF & Peripheral frequency

  33. FDs – Interpolation FCST BASED ON 251200 DATA VALID 251800 FOR USE 17-21 3000 6000 9000 12000 18000 YAM 0117 3613-19 9900-21 9900-26 2408-35 YOW 0720 0814-13 1109-12 1614-15 1934-22 YQG 3309 3109-14 2707-16 2313-20 2232-28 YVV 0606 0305-15 9900-17 2016-20 2039-28 YYB 1825 2034-16 2055-17 2073-20 7013-28 YYZ 0410 0506-13 9900-13 1909-17 1927-25

  34. CYGK FLIGHT PLANNING LOG GULP ME 22 MAR 01 76 :56 7.8 :30 2.2 76 1:26 10.0

  35. VOR

  36. VOR EQUIPMENT CHECKS

  37. TRACKING AWAY FROM A STATION

  38. TRACKING TO A STATION

  39. ADF LIMITATIONS • TWILIGHT EFFECT • JUST BEFORE/AFTER SUNSET/SUNRISE - fly high • GREATER AT GREAT DISTANCE – use less than 350 khz • TERRAIN or MOUNTAIN EFFECT • SHORELINE – signals crossing at less than 30o • ELECTRICAL STORMS • BANK ERROR – ALL TURNS • LOOP ANTENNAE ROTATES TO SENSE DIRECTION OF INCOMING SIGNAL AND IS MOUNTED PARALLEL TO NORMAL AXIS

  40. SOME RULES • WHEN INTERCEPTING A TRACK TO OR FROM A STATION, BEARING INDICATOR ALWAYS AWAY FROM 0 OR TOWARDS 180 2. WHEN TURNING, IF HEADING INDICATOR INCREASES, THEN ADF BEARING INDICATOR (VALUE) DECREASES HI LESS, ADF MORE • WHEN TRACKING, NEEDLE RIGHT? YES, THEN WIND IS FROM THE RIGHT SO TURN RIGHT, ETC. • MAGNETIC HEADING + RELATIVE BEARING = MAGNETIC BEARING TO THE STATION MH + RB = MB TO THE STATION MH = MB – RB RB = MB - MH

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