In the modern era, fast-moving weapons have been discovered, such as fast-moving missiles.
Terms like ballistic missile, supersonic, and hypersonic missiles are common in
military discussions. They all operate on different principles. The difference between them
is not just about speed, it’s about trajectory, range.

The Grandfather: Ballistic Missiles

Ballistic missiles are the oldest type of missiles, but they are the most powerful among
all missiles. They are like a space rocket. Just like a rocket after launch, they split into
three phases:

Boost Phase

A rocket engine fires, pushing the missile high into the atmosphere or even into space.

Midcourse Phase

The engine stops. The missile continues moving upward, then curves over and starts
falling back toward Earth. It follows a high, curved path, like a thrown football. For most of
this phase, the missile is coasting in space.

Terminal Phase

The warhead re-enters the Earth’s atmosphere and drops toward its target at incredibly high speed.

Key Characteristics:

Speed: Ballistic missiles are incredibly fast. An Intercontinental Ballistic Missile can reach speeds of Mach 20+ (over 15,000 mph) during re-entry into the atmosphere.

Trajectory: Their path is obvious when they launch. They follow high, unchangeable curve.

Range: This is where range matters most. Ballistic missiles are categorized by range:

• Short-Range (SRBM): Up to 600 miles.
• Medium-Range (MRBM): 600 to 2,000 miles.
• Intermediate-Range (IRBM): 2,000 to 3,400 miles.
• Intercontinental (ICBM): Over 3,400 miles (can reach any continent).

They go so high and coast for so long that ballistic missiles can travel long distances.
Their predictable path makes them detectable in radar.

The Cruisers: Supersonic Missiles

Supersonic missiles are generally “cruise missiles.” Like ballistic missiles, they do not
go to the space. They remain in earth’s atmosphere. They fly low and avoid radar
detection. They travel at high speed faster than the sound.

Key Characteristics:

Speed: Supersonic travel faster than the speed of sound (Mach 1). Supersonic missiles typically cruise between Mach 2 and Mach 4 (1,500 to 3,000 mph).

Trajectory: They fly a flat, terrain-hugging path. For the entire flight, they are powered by jet engines, which meaning they can steer, turn, navigate around hurdle.

Range: These missiles are of shorter ranges than ballistic missiles. Their ranges are limited, because they burn fuel continously to maintain high speed at low altitude:

• Typical ranges vary from 60 to 300 miles for anti-ship variants.
• Some ground-attack versions can reach 1,000+ miles.

The New Breed: Hypersonic Weapons

Hypersonic weapons are the new type of weapons. They combine the speed of a ballistic
missile with the maneuverability of a cruise missile. There are two main types:

• Hypersonic Glide Vehicles (HGV)
• Hypersonic Cruise Missiles (HCM)

Key Characteristics:

Speed: By definition, “hypersonic” means exceeding Mach 5 (over 3,800 mph). They generally travel at Mach 5 to Mach 10.

Trajectory: This is the key difference. Instead of following a high curve like ballistic, a hypersonic glide vehicle is launched on a rocket, but then detaches and glides toward the target at low altitude within the atmosphere. It can move in the zig zag motion to avoid defences.

Range: Hypersonic missiles cover the “middle ground.” They generally have a range between 600 and 3,000 miles. They are designed to hit medium-to-long range targets. It is faster than a supersonic missile, but with more adjustability than a ballistic missile.

How Range Matters

Range is an important factor. To hit a distant capital, we cannot use a short-range missile, and using an ICBM for a target 100 miles away is overkill.

Ballistic Missiles: This is determined by altitude and power. The higher the rocket goes, the farther the warhead will coast. This makes them ideal for strategic deterrence, ensuring a nation can strike any enemy on Earth.

Supersonic Missiles: These are limited by fuel efficiency. Since they fly low and are powered the entire way, engineers must balance speed against distance. These are often used as “anti-access” weapons, launched from ships or planes to hit enemy ships or coastal targets within a few hundred miles.

Hypersonic Weapons: Range is about survivability. Because they have medium to long range but fly low, they are designed to penetrate modern air defense systems that can shoot down older ballistic missiles.

Comparison Table

Features	Ballistic Missile	Supersonic Missile	Hypersonic Missile
Speed	Very high	High	Very high
Flight path	High curve, go upto space, predictable	Low, flat	Low to medium, stays in the atmosphere
Engine type	Rocket	Jet engine	Scramjet or Rocket
Typical range	180 to 9000+ miles	60 to 1000+ miles	600 to 3000 miles
Main purpose	Hit fixed target	Tactical strikes	To defeat modern air defense system
Maneuverability	none	High	Very high