JO 7110.65 5-13-5

The display of Mode C targets and limited data blocks is necessary for application of Merging Target Procedures. Sectors must ensure the display of Mode C targets and data blocks by entering appropriate altitude limits and display filters to include, as a minimum, the altitude stratum of the sector plus:

1,200 feet above the highest and below the lowest altitude or flight level of the sector where 1,000 feet vertical separation is applicable; and

2,200 feet above the highest and below the lowest flight level of the sector where 2,000 feet vertical separation is applicable. NOTE-

The data block, for purposes of this paragraph, must contain the Mode C altitude and call sign or beacon codeat a minimum.

Exception to these requirements may be authorized for specific altitudes in certain ARTCC sectors if defined in appropriate facility directives and approved by the respective service area operations directorate.