NAV Brasil Aeronautical Meteorologist study guide
NAV Brasil Aeronautical Meteorologist · Work through your exam, one topic at a time.
The NAV Brasil Aeronautical Meteorologist credential is aimed at meteorologists who want to work within Brazil's air navigation system, producing and interpreting the weather information that keeps flights safe. NAV Brasil, the state enterprise responsible for air navigation services, hires and accredits professionals who staff meteorological offices, brief pilots and operators, and issue aerodrome forecasts, warnings and trend information. The NAV Brasil Aeronautical Meteorologist study guide has 12 sections and about 2,574 words.
01Physical Meteorology and Atmospheric Thermodynamics
A candidate must command the equation of state for dry air (p = ρRdT) and moist air, the hydrostatic equation, and the hypsometric equation used to derive thickness and heights. Understand the first law of thermodynamics in both forms, potential temperature (θ = T(1000/p)^(Rd/cp)), the Exner function, and the stability criteria dθ/dz.
317 words, about 2 min02Dynamic Meteorology and Synoptic-Scale Systems
Master the primitive equations: momentum (with Coriolis and pressure-gradient terms), continuity, thermodynamic energy, and moisture. Understand geostrophic and gradient wind balance, the thermal wind relation, and hypsometric thickness as a proxy for mean-layer temperature.
280 words, about 1 min03Synoptic and Mesoscale Meteorology
Understand synoptic-scale systems: extratropical cyclones and their frontal structure (cold, warm, occluded, stationary), the Norwegian and Shapiro–Keyser cyclone models, and the life cycle of frontal waves. Study air masses and their source regions, frontal identification criteria (temperature gradient, wind shift, pressure trough, dew-point change), and the conveyor-belt model (warm and cold conveyor belts).
271 words, about 1 min04Weather Analysis and Forecasting
Learn surface and upper-air chart analysis: isobar spacing and gradient, isallobars, thickness, and the 500 hPa pattern. Understand the use of soundings and hodographs, stability indices (LI, CAPE, CIN, shear), and the interpretation of numerical model output including ensembles and spaghetti plots.
209 words, about 1 min05Aeronautical Meteorology and Aviation Weather Hazards
Understand the hazards affecting aviation: thunderstorms, icing, turbulence, wind shear, microbursts, low-level wind shear, volcanic ash, sandstorms, and clear-air turbulence. Study the formation of aircraft icing (supercooled water, temperature range 0 to −20 °C), the types of icing (rime, clear, mixed), and the effects on lift and drag.
231 words, about 1 min06Meteorological Instruments, Observations, and Networks
Know surface instruments: barometers, thermometers, hygrometers, anemometers, rain gauges, and ceilometers. Understand upper-air observations by radiosonde, including pressure, temperature, humidity, and wind measurement, and the sources of error.
190 words, under 1 min07Remote Sensing and Meteorological Satellites
Understand satellite orbits: geostationary (high altitude, continuous view) and polar-orbiting (low altitude, global coverage, higher resolution). Study visible, infrared, and water-vapour channels, and the interpretation of cloud patterns.
183 words, under 1 min08Numerical Weather Prediction and Data Assimilation
Understand the governing equations discretised in NWP models, grid spacing, and resolution. Study parameterisations for radiation, convection, boundary layer, and microphysics.
189 words, under 1 min09Climatology and Applied Meteorology
Understand climate classification, global circulation, and the role of the ITCZ, subtropical highs, and mid-latitude westerlies. Study the climate of Brazil: equatorial, tropical, semi-arid, and subtropical zones, and the influence of the South Atlantic Convergence Zone and El Niño/Southern Oscillation.
161 words, under 1 min10ICAO Annex 3, MET Service Provision, and Air Navigation Regulation
Know ICAO Annex 3 provisions: METAR, SPECI, TAF, TREND, SIGMET, AIRMET, and the area forecasts (GAMET). Understand the roles of the meteorological watch office, the world area forecast system, and the tropical cyclone and volcanic ash advisory centres.
206 words, about 1 min11Portuguese Language and Text Interpretation
Candidates must read and interpret technical and regulatory texts in Portuguese with precision. Focus on comprehension of main ideas, inference, and vocabulary in context.
172 words, under 1 min12English for Aviation Meteorology
Candidates must read and interpret technical English in aviation meteorology: METAR, TAF, SIGMET, and PIREP texts. Focus on vocabulary such as 'ceiling', 'visibility', 'overcast', 'broken', 'freezing level', and 'wind shear'.
165 words, under 1 min