King Cold's ship is presumably his base of operations. While the ship was searching through Namek's remains for Frieza, King Cold broke his ship's window (causing one of his men to fall into space's vacuum). When the captain discovered Frieza, they brought him to the ship and took him to King Cold's planet, where King Cold's top men built Frieza's cyborg body parts, thus Mecha Frieza was "born".
They land at Northern Wastelands, and order their soldiers to begin the attack. However, a mysterious youth unexpectedly shows up. After the young Super Saiyan kills both Frieza and King Cold, he blows the ship up with a powerful God Breaker.
Video Game Appearances
King Cold's spaceship makes brief appearances in Dragon Ball Z III: Ressen Jinzōningen, Dragon Ball Z: Budokai, Dragon Ball Z: The Legacy of Goku II, and Dragon Ball Z: Harukanaru Densetsu. In The Legacy of Goku II, after the ship's destruction, it is said Dr. Brief is checking its remains.
It also appears in Dragon Ball Z: Kakarot, though unlike Frieza's Spaceship it only appears briefly during a few cutscenes and in the background of Future Trunks' battle with Mecha Frieza, after which it is destroyed by Future Trunks after killing King Cold with God Breaker. Interestingly, the spaceship's landing site is the Continent Central Area which is same area where Goku's Ginyu Force Round Spaceship lands and where Cell later builds the Cell Games Arena.