Verbatim from live eCFR, read 2026-08-14 at title 14 currency 2026-08-12:
3 hours of flight training in a single-engine airplane on the control and maneuvering of an airplane solely by reference to instruments, including straight and level flight, constant airspeed climbs and descents, turns to a heading, recovery from unusual flight attitudes, radio communications, and the use of navigation systems/facilities and radar services appropriate to instrument flight
Six things, and ACS Area XI lists four of them. Straight and level, constant airspeed climbs and descents, turns to a heading, and unusual attitude recovery are AI.XI.A through AI.XI.E. Radio communications, and the use of navigation systems, facilities, and radar services, are in the regulation and are not in Area XI.
This matters at the moment of signing. Teach only what Area XI lists, then endorse a private student's three hours, and you have endorsed training the regulation describes more of. The four maneuvers are the flying. The last two are what makes the training survivable in a real encounter, because a pilot in cloud who cannot talk to anybody and cannot work the box is not much better off than one who cannot hold a heading.
So this lesson covers all six. The hood session includes at least one radio transmission and one navigation task. That is standard 6.