 Initially, roll-out of the VHF New Range sets was restricted to the Royal Armoured Corps and the Royal Artillery, reflecting the fact that these formed the "teeth" elements likely to be involved in meeting any perceived threat of a Soviet advance across northern Europe.In 1962 a project to re-equip the remainder of the army was undertaken and given the name Larkspur, the name officially becoming retrospectively applied to the original New Range sets and eventually by common use becoming a technically incorrect generic label for virtually any radio equipment used by the British Army between the end of WWII and the arrival of the Clansman Combat Net Radio family.The HF set of the family, the C13 was included for use as a short-range combat net radio in circumstances where VHF was unsuitable and could also be used (using AM or CW) for longer range operation by exploiting skywave and near-vertical incidence propagation techniques.