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Resolution Advisory [,rezə'lu:ʃ(ə)n ,əd'vaɪz(ə)rɪ]
abbr., scottish	RA
resolution advisory [,rezə'lu:ʃ(ə)n ,əd'vaɪz(ə)rɪ]
avia., Canada	An advisory issued by airborne collision avoidance system ACAS/traffic alert and collision avoidance system TCAS to alert pilots to potential conflicting air traffic and provide them with a suggested flight- path change in the vertical plane to reduce the possibility of collision

Resolution: 2 phrases in 1 subject

Abbreviation

2