Garmin GPSMAP 396 Owner's Manual - Page 160

TIS > Operation Procedures TIS Operational Procedures TIS warns the user with voice and visual traffic advisories whenever it predicts an intruder to be a threat. The user should not start evasive maneuvers using information from the GPSMAP 396 screen or on a traffic advisory only. The display and advisories are intended only for assistance in visually locating the traffic, due to the lack in resolution and coordination ability. The flight crew should attempt to visually acquire the intruder aircraft and maintain a safe separation in accordance with the regulatory requirements and good operating practice. If the flight crew cannot visually acquire the aircraft, they should contact ATC to obtain any information that may assist concerning the intruder aircraft. Based on the above procedures, minor adjustment to the vertical flight path consistent with air traffic requirements are not considered evasive maneuvers. The TIS Traffic Advisory (TA) should alert the crew to use additional vigilance to identify the intruding aircraft. Any time the traffic symbol becomes a yellow circle or a voice warning is announced, conduct a visual search for the intruder. If successful, maintain visual contact to ensure safe operation. 0.5 nm Intruder Aircraft + 500 ft This area within 34 seconds - 500 ft Conditions for Traffic Advisories TIS shows a Traffic Advisory (TA) on the GPSMAP 396 when an intruder aircraft approaches your aircraft on a course that intercepts (defined by a 0.5 nm horizontal radius and a relative altitude of ± 500 ft) your course within 34 seconds. 152 GPSMAP 396 Owner's Manual