Small Aircraft; Low Wing; 2 Eng; Retractable Gear
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 176; Flight Crew Total 1465; Flight Crew Type 445
Conflict NMAC
Flight Crew Took Evasive Action
Procedure
I was flying with a student practicing approaches. We were flying an ILS approach when we were given a traffic advisory regarding another aircraft. I saw this aircraft from several miles away and kept an eye on it. This aircraft was flying laterally through the approach corridor at altitudes published on the ILS approach we were flying. The aircraft did not deviate from its path and continued towards us. I took controls from my student (then using a view limiting device) when the aircraft was close enough to warrant evasive action; which resulted in a 300 foot climb. I advised approach that I was climbing to avoid the traffic. I looked down and saw the aircraft at the altitude that we had just vacated with little to no lateral separation from where we just were. I believed that this aircraft would see where we were given that I saw them; however this aircraft either did not see us; or did not choose to deviate from their current trajectory despite having seen us. I should have deviated sooner to avoid this aircraft and prevent what ultimately turned into a near miss.
Flight instructor reported experiencing a NMAC while conducting instrument approach instruction with a student using a vision-limiting device.