UA.II.A.K3: Other airspace areas, such as Airport Advisory Services, Military Training Routes (MTRs), Temporary

ACS Area II — Airspace Classification and Operating Requirements Task A: Airspace Classification References: 14 CFRCode of Federal RegulationsCloseThe federal rulebook where Part 107, Part 89, Part 48, and other aviation rules live. part 71; ACAdvisory CircularCloseFAA guidance that explains acceptable ways to comply with rules or understand FAA procedures. 107-2; AIMAeronautical Information ManualCloseFAA operational guidance and glossary material used to understand aviation procedures and terminology.; FAAFederal Aviation AdministrationCloseThe U.S. aviation regulator responsible for Part 107 rules, airspace, and pilot certification processes.-H-8083-25; FAAFederal Aviation AdministrationCloseThe U.S. aviation regulator responsible for Part 107 rules, airspace, and pilot certification processes.-G-8082-22

Key Concepts

What “Other Airspace Areas” Means on the Exam

Beyond controlled (Class A–E), uncontrolled (Class G), and special use airspace, the National Airspace System includes “other airspace areas” that affect how you plan and execute flights. These include advisory services at airports, Military Training Routes (MTRsMilitary Training RouteCloseA published route used by military aircraft, often at high speed and sometimes low altitude.), and VFRVisual Flight RulesCloseRules for flight using visual reference and minimum weather conditions. planning features around Class B airspace. Know where these fit in the FAAFederal Aviation AdministrationCloseThe U.S. aviation regulator responsible for Part 107 rules, airspace, and pilot certification processes.’s airspace framework: regulatory areas include Classes A–E plus prohibited/restricted, while nonregulatory areas include MOAsMilitary Operations AreaCloseSpecial use airspace where military training may occur. It is shown on charts and matters for traffic awareness., warning, alert, and controlled firing areas. You will often operate near or under these, so situational awareness and chart review are critical.^[5]

Airport Advisory Services (LAA/RAIS)

• Participation is voluntary but strongly encouraged because it enhances safety for all operations in and around busy general aviation airports without towers. Expect traffic pattern, wind, and runway-use information akin to what an FSSFlight Service StationCloseFAA-certified briefing support for weather, NOTAMs, and flight information. would provide. On a test question that asks whether you “must” participate, the correct answer is no—it’s not mandatory.^[4]
• Remote Airport Advisory Service (RAISRemote Automated Information ServiceCloseA remote advisory or information service referenced in airport and flight service context.) can be set up for specific airport needs. The airport authority/manager must request RAISRemote Automated Information ServiceCloseA remote advisory or information service referenced in airport and flight service context. in writing from the supporting Flight Service Station at least 60 days in advance; approval is at the FSSFlight Service StationCloseFAA-certified briefing support for weather, NOTAMs, and flight information. manager’s discretion based on workload and resources. This is a planning and coordination item you may see on the exam or in scenario questions about temporary advisory support during special events.^[4]

Practical takeaway: Even when not required, monitor and provide position reports when an advisory program is active. Expect advisory traffic calls—not control instructions.

Military Training Routes (MTRs)

• Purpose and risk: MTRsMilitary Training RouteCloseA published route used by military aircraft, often at high speed and sometimes low altitude. support low-altitude, high-speed military training. The speeds and maneuvers reduce see-and-avoid margins for all users. For remote pilots, that means heightened vigilance and conservative routing/timing when operating near an MTRMilitary Training RouteCloseA published route used by military aircraft, often at high speed and sometimes low altitude..^[4]
• Altitudes and operating rules:
  • Segments at and below 1,500 feet AGLAbove Ground LevelCloseAltitude measured above the ground directly below the aircraft. are generally developed to be flown under VFRVisual Flight RulesCloseRules for flight using visual reference and minimum weather conditions..^[4]
  • Segments above 1,500 feet AGLAbove Ground LevelCloseAltitude measured above the ground directly below the aircraft. are developed to be flown, to the maximum extent possible, under IFRInstrument Flight RulesCloseRules for operating primarily by instruments. On the exam, IFR often appears in weather, traffic, and airspace context..^[4]
  • MTRsMilitary Training RouteCloseA published route used by military aircraft, often at high speed and sometimes low altitude. are generally established below 10,000 feet MSLMean Sea LevelCloseAltitude measured from average sea level, not from the ground below you. for operations in excess of 250 knots, though segments may be defined at higher altitudes for continuity (climb/descent, terrain).[^^4]
• Exam cues: Expect questions emphasizing the low-level/very high speed nature of MTRMilitary Training RouteCloseA published route used by military aircraft, often at high speed and sometimes low altitude. traffic and the VFRVisual Flight RulesCloseRules for flight using visual reference and minimum weather conditions.-versus-IFRInstrument Flight RulesCloseRules for operating primarily by instruments. On the exam, IFR often appears in weather, traffic, and airspace context. planning split at 1,500 feet AGLAbove Ground LevelCloseAltitude measured above the ground directly below the aircraft.. If a prompt asks what to do when operating near an MTRMilitary Training RouteCloseA published route used by military aircraft, often at high speed and sometimes low altitude., the safest answer is to maintain vigilant scanning, consider alternate routing or timing, and monitor appropriate frequencies when able.

VFR Flyways, VFR Corridors, and Related Communications

• VFR Flyways: Planning routes depicted on the reverse side of many TACs to help VFRVisual Flight RulesCloseRules for flight using visual reference and minimum weather conditions. pilots avoid major controlled traffic flows under/around Class B airspace. They are advisory only and do not require a clearance, but they are not free of traffic—maintain VFRVisual Flight RulesCloseRules for flight using visual reference and minimum weather conditions. vigilance. They are intended to help you plan to remain clear of Class B if desired.^[8]
• VFR Corridors: Defined lateral and vertical airspace “holes” through some Class B areas in which aircraft may operate without an ATCAir Traffic ControlCloseThe system that manages controlled airspace, traffic flow, and aircraft separation services. clearance or communication with ATCAir Traffic ControlCloseThe system that manages controlled airspace, traffic flow, and aircraft separation services.. A well-known historical example is the Los Angeles corridor, later changed to Special Flight Rules (SFRSpecial Flight RulesCloseSpecial flight rules that apply to a defined area or operation.) airspace. Corridors are rare and tightly defined—don’t confuse them with flyways.^[8]
• Communications under Class B shelves: When operating beneath Class B, you must establish and maintain communications with any control tower while transiting the Class B, Class C, and Class D surface areas of airports under that Class B. This is a frequent test trap—“under the Bravo” doesn’t waive required tower communications in the surface areas you enter.^[8]
• Why flyways/corridors matter: Class B itself requires an ATCAir Traffic ControlCloseThe system that manages controlled airspace, traffic flow, and aircraft separation services. clearance for all aircraft and provides separation services; VFRVisual Flight RulesCloseRules for flight using visual reference and minimum weather conditions. cloud clearance in Class B is “clear of clouds.” Flyways help you plan to avoid the airspace and its clearance requirement; corridors, where charted, legally pierce the Class B without ATCAir Traffic ControlCloseThe system that manages controlled airspace, traffic flow, and aircraft separation services. contact. Know this distinction for the exam.^[2][8]

Bonus regulatory anchor: Class A airspace runs from 18,000 feet MSLMean Sea LevelCloseAltitude measured from average sea level, not from the ground below you. up to and including FLFlight LevelCloseAltitude expressed using a standard pressure setting, mainly relevant to higher-altitude crewed aviation. 600, including airspace over waters within 12 NMNautical MileCloseA distance unit used in aviation. One nautical mile is about 1.15 statute miles. of the U.S. coastline. Operations require IFRInstrument Flight RulesCloseRules for operating primarily by instruments. On the exam, IFR often appears in weather, traffic, and airspace context. unless otherwise authorized, tied to 14 CFRCode of Federal RegulationsCloseThe federal rulebook where Part 107, Part 89, Part 48, and other aviation rules live. Section 71.33 and Sections 91.167–91.193. Although sUASSmall Unmanned Aircraft SystemCloseA small drone plus the control and communication links used to operate it. do not operate there, these figures are common exam facts.^[2]