how does an AH-64 Apache helicopter provides indirect fire during combat?

Answer 1

The term "indirect" fire generally applies the artillery. A helo could act as a spotter however directing the fire. A job for scout copters like the Kiowa's rather than gunships

Answer 2

There are two ways this can be achieved.

The hellfire missle fires on an arc so it bops the target on the head. This allows the Apache to fire over mountains, buildings and trees without showing itself. Laster hellfires can be passed off guys on the ground with laser sights. They do the aiming, while the Apache does the shooting. The Apache D (longbow) has a radar dome on the top that allows a scan once, duck down and shoot the Longbow radar guided hellfire missles which will go after the target picked up on the scan even though the Apache is no longer tracking and hiding behind a mountain.

The Apache D can pass off radar tracked targets to other weapon systems and use it's systems to guide other systems, such as guide laser guided bombs and missles from another aircraft. An Apache D can track and destroy 120 targets in less than 3 minutes carrying just 16 hellfire missles just because it can pass off the other 104 targets to other weapon systems especially Apache Cs (Apache Ds without the radar dome) that follow the Apache D into battle.

Answer 3

Without going into great detail, suffice to say that none of an Apache's armament is configured for indirect fire - the 30mm chaingun, the 2.75" rockets, the Hellfires.

However, a Longbow can act as a spotter for other Apaches hidden away from line of sight, enabling all to engage multiple targets with Hellfires, with only the Longbow exposed.

That last bit is open source knowledge and has been for years.

Answer 4

It is an attack helicopter and provides mostly line of sight direct fire.