Sontaran scout ship

Sontaran Scout ships were large, spherical spacecraft used by the Sontarans to scout ahead before a fleet to investigate or infiltrate the enemy.

Usage
When the Sontarans joined The Alliance, formed to imprison the Eleventh Doctor in the Pandorica in order to save the Universe, several Sontaran scout ships were part of the Alliance fleet which arrived at Stonehenge in 102 A.D. (DW: The Pandorica Opens)

In 1522, a Sontaran Scout Ship crashed in China. (DWM: Dragon's Claw)

In the 13th century, Jingo Linx was forced to deploy his scout ship, but it was damaged and he had to land on Earth where he and it were destroyed. (DW: The Time Warrior)

UNIT believed that a Sontaran scout ship crashed in Tunguska in the early 20th century, though they weren't entirely sure. They kept some of this wreckage in the Vault. (CC: Tales from the Vault)

Several scout ships orbited the main Sontaran flagship during the Sontaran invasion of Earth in 2009. (DW: The Sontaran Stratagem / The Poison Sky) Kaagh was in one of these scout ship as he crashed to Earth. With his arm strap he was able to move the ship to a hidden location and even make it invisible. (SJA: The Last Sontaran)

UNIT Underbase contained a Sontaran scout ship. (DWM: The Age of Ice)