US instrument teaching: applicability, clearance and descent decisions
An instrument ground lesson should connect the displayed information with the decision it supports. Identify the aircraft, equipment, operating rule and procedure before applying a remembered number. A charted minimum, an aircraft limitation, a pilot authorization and a forecast planning condition answer different questions. This chapter provides selected US foundations rather than a complete current operational checklist or permission to undertake an instrument flight.
Separate ground and flight authority
Under the current ground-instructor privileges rule, an instrument ground instructor rating supports the specified instrument-rating ground training, instrument proficiency-check ground training and instrument knowledge-test recommendation. Those ground privileges do not turn the holder into a flight instructor or independently establish pilot-in-command qualifications. The actual certificate, rating limitations, recency provisions and any additional authorization still apply. Do not use a page's practice question count as an official exam fact.
Clearance and aircraft position
For an IFR operation in controlled airspace, the applicable rule requires both an IFR flight plan and an appropriate clearance. Filing alone is not a clearance. Teach the learner to identify the actual cleared route, altitude and clearance limit, and to distinguish a clearance from an expectation of a later one. An amendment may change one element without silently changing every other element.
US two-way-radio-failure rules distinguish VFR conditions from continued IFR conditions. In VFR conditions the rule calls for continuing under VFR and landing as soon as practicable. When the IFR branch applies, route selection and altitude selection are separate questions. The altitude provision uses the highest applicable assigned, minimum-IFR and expected altitude for the route segment, not the lowest. Clearance-limit and timing provisions require their own analysis; a mnemonic alone does not resolve an incomplete scenario.
Approach evidence
Descent below the applicable decision altitude or minimum descent altitude requires the actual rule's conditions, including normal landing position, prescribed flight visibility and an authorized distinctly identifiable visual reference. Seeing an airport beacon alone does not meet the listed runway-reference requirement. Approach lights have a particular restricted role; do not replace the rule with the assertion that any light always permits landing.
A missed approach must respect the actual procedure, aircraft limitations, position and instructions. Starting a climb early does not automatically authorize an early turn into terrain or traffic. Ground exercises should identify what the chart and clearance actually say and what information remains missing. Use current FAA charts, notices, regulations and aircraft guidance before real operations, with appropriately qualified instruction to establish practical proficiency.