Widebody; Low Wing; 4 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 2
Confusion; Distraction; Situational Awareness; Time Pressure
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Provided Assistance; Flight Crew Returned To Clearance
Chart Or Publication; Human Factors; Procedure
Aircraft X departed Runway 7L on the ANCHORAGE SIX SID. The SID states to fly runway heading until 2;000 or TED VOR 4 DME; whichever comes first; then turn right to heading 200. Aircraft X was observed to reach 2;000 about 3.5 miles from the VOR. A low altitude alert alarmed and Aircraft X was issued a low altitude alert. We verified Aircraft X was in the turn to heading 200. The aircraft responded in the affirmative. Aircraft X was observed to pass an estimated 2.8 miles from a mountain at 4;000 where the mountain peak is depicted on our charts as 4;700. This event is not a singular occurrence. The altitude and DME for this procedure is the same as the KNIK9 SID. One SID has the '2;000 or 4 DME - Whichever Comes First' in the narrative of the SID and the other has it in the depiction. I believe this causes confusion to pilots as numerous heavy aircraft wait until 4 DME prior to turning; regardless of altitude. I recommend the charts be changed to both show '4 DME or 2;000 FT - Whichever Comes First' in both the narrative and depiction. I also recommend heavy aircraft not be issued the ANCHORAGE SIX Departure due to unsafe proximity to terrain.
A11 Controller reports of a low altitude alert caused by an aircraft not turning as instructed. Aircraft turned and left low altitude area. Controller reports this is not uncommon for this type of aircraft and recommends this type of aircraft not to be allowed to fly this departure.