JO 7110.65 5-3-3

When using only Mode 3/A radar beacon or ADS-B to identify a target, use one of the following methods:

Request the pilot to activate the “IDENT” feature of the transponder/ADS-B and then observe the identification display. PHRASEOLOGY-

IDENT.

SQUAWK (code) AND IDENT.

Request the pilot to change to a specific discrete or nondiscrete code, as appropriate, and then observe the target or code display change. If a code change is required in accordance with Section 2, Beacon/ADS-B Systems, of this chapter, use the codes specified therein.

Request the pilot to change their transponder/ADS-B to “standby.” After you observe the target disappear for sufficient scans to assure that loss of target resulted from placing the transponder/ADS-B in “standby” position, request the pilot to return the transponder to normal operation and then observe the reappearance of the target. PHRASEOLOGY-

SQUAWK STANDBY,

then

SQUAWK NORMAL.

EN ROUTE. An aircraft may be considered identified when the full data block is automatically associated with the target symbol of an aircraft that is squawking a discrete code assigned by the computer. NOTE-

Paired LDBs in ERAM do not display a beacon code.

PHRASEOLOGY-

SQUAWK (4 digit discrete code),

or, if aircraft's altitude reporting capability is turned off,

SQUAWK (4 digit discrete code), SQUAWK ALTITUDE.

NOTE-

The AIM informs pilots to adjust Mode C transponders and ADS-B with altitude reporting capability activated unless deactivation is requested by ATC. “Squawk altitude” is included here to provide applicable phraseology.

REFERENCE-

FAA Order JO 7110.65, Para 3-1-9 , Use of Tower Radar Displays.

FAA Order JO 7110.65, Para 5-3-6 , Position Information.