Cobra missile

Cobra missiles were human weapons in use in the 20th century. Snowcap Base was equipped with an arsenal of these weapons for self defence. (DW: The Tenth Planet)
 * The reference to this missile in The Tenth Planet'' would have emphasised to contemporaneous viewers the "international" flavour of Snowcap Base. Cobras were never a part the British arsenal, and were instead strongly identified with the German and continental NATO armies.