Crash landing and Instrument landing

Crash landing noun - An emergency landing under circumstances where a normal landing is impossible (usually damaging the aircraft).

Instrument landing and crash landing are semantically related. In some cases you can replace phrase "Instrument landing" with "Crash landing", this phrases are similar.

Instrument landing noun - An aircraft landing made entirely by means of instruments.

Crash landing and instrument landing are semantically related. Sometimes you can replace phrase "Crash landing" with "Instrument landing", this phrases are similar.