what does msa guarantee
Report Abuse. MSA simply provides a safe altitude, or series of safe altitudes. If I remember correctly, at the msa you are guaranteed 1,000' over any obstacle and terrain. The 25nm example you give is a 25nm radius from whatever the point is.It could be an airport, a fix, vor, ndb, outter marker, whatever.eport Abuse. MSA simply provides a safe altitude, or series of safe altitudes. If I remember correctly, at the msa you are guaranteed 1,000' over any obstacle and terrain. The 25nm example you give is a 25nm radius from whatever the point is.