Seliger Rocket is the designation for the sounding rocket

Sounding rocket

A sounding rocket, sometimes called a research rocket, is an instrument-carrying rocket designed to take measurements and perform scientific experiments during its sub-orbital flight. The origin of the term comes from nautical vocabulary, where to sound is to throw a weighted line from a ship into...

s of the Berthold Seliger Forschungs- und Entwicklungsgesellschaft mbH. They were

1. A single-stage rocket with a length of 3.4 metres and a takeoff thrust of 50 kN. This rocket was first launched on November 19th, 1962 near Cuxhaven
   Rocket experiments in the area of Cuxhaven
   Between 1933 and 1964 numerous rocket experiments were carried out in the area of Cuxhaven, Germany.-1930s and 1940s:*In April 1933 Gerhard Zucker launched a mail rocket, which was to fly from Duhnen to the island of Neuwerk, but which fell to Earth after flying a few meters.*During World War II...
   
    and reached a height of 40 km.
2. A two-stage rocket with a length of 6 metres and a takeoff thrust of 50 kN. This rocket was first launched on February 7th, 1963 and reached a height of 80 km.
3. A three-stage rocket with a length of 12.8 metres, a diameter of 0.56 metres and a takeoff thrust of 50 kN. This rocket was first launched on May 2nd, 1963 with reduced fuel and reached an altitude of 110 km. Later with maximum fuel it reached a height of 150 km.

All Seliger Rockets return to the ground by parachute

Parachute

A parachute is a device used to slow the motion of an object through an atmosphere by creating drag, or in the case of ram-air parachutes, aerodynamic lift. Parachutes are usually made out of light, strong cloth, originally silk, now most commonly nylon...

. The single-stage version was completely reusable. Additional single and two-stage rockets were developed in 1963, which could be also used for military purposes. There were flight demonstrations of these rockets to military representatives of non-NATO countries on December 5th, 1963.