night collision avoidance

Red nav light on Right implies target is Returning (closing) Red, Right, Returning

pre-final

Missed (procedure), Altitude (limit), Radios (set), Time (limit), Heading (final), Airspeed (descent) MARTHA

pre-flight-paperwork

Airworthiness (certificate), Registration, Required (charts), Operating (checklists), Weight and balance ARROW

pre-high-altitude

Flow (enabled), Lights (test), Oxygen (charged), Water (humidity), Electricity (on), Radio (check) FLOWER

pre-landing

Gas, Undercarriage, Mixture, Propeller, Speed. GUMPS

radio loss Instrument course

Cleared, else Direct to last fix, else as directed to Expect, else as flight plan Filed CDEF