Jump Pack

A Jump Pack is a bulky, vectored-thrust rocket engine fueled by Promethium that can be worn as an attachment by a single soldier, designed to be attached to the backpacks of the Space Marines' or the Sisters of Battle's suits of Power Armour. They are used to make powered jumps across the battlefield, allowing the warriors wearing them to cover ground quickly and unexpectedly drop into the midst of their foes to launch a close-combat assault. Jump Packs are thus used by assault troops, primarily the Assault Marines of the Space Marine Chapters, and the Seraphim of the Sisters of Battle. All Space Marine Chapters have at least one squad equipped with Jump Packs, and even some of the more notable Chapters, such as the Soul Drinkers, only possess one Jump Pack-equipped team. Unlike the other equipment used by the Space Marines, such as Assault Bikes, main battle tanks and Terminator Armour, Space Marine commanders do not use Command Squads that are eqipped with Jump Packs. The exception to this general rule can be found in Astartes forces that are particularly oriented towards the use of assault tactics, such as the Blood Angels Chapter. The use of a Jump Pack is often paired with the Chainsword or Power Claw, as the Pack's ability to traverse great distances makes the use of long-ranged weapons pointless.

Sanguinary Guard
The Blood Angels Chapter also possesses a unique, elite group within its order of battle, the Sanguinary Guard, who wear special Single-Thruster Jump Packs, which work in the same way as normal Jump Packs except that instead of having two thrusters, they only have one, hence the use of the term "single". These Jump Packs are often hidden by ornamental wings to remind them of the Blood Angels' Primarch Sanguinius' own wings.