ED-285 Change 1 Minimum Operating Performance Standards for Helicopter Terrain Awareness and Warning Systems (HTAWS) for Offshore Helicopter Operations will change a graphical error in Figure 3-9 to ensure that Alert Criteria – Caution number OHTAWS_REQ35. and OHTAWS_REQ36. are displayed correctly. The numbers on the graph appear differently than the lines on the graph defining the “May Alert” area.