Are there two types of thrusters

[Itz JoshE]

it seems that chief always has access to his thrusters, but they cant be used by the player unless we pick up an armour ability, this confuses me as the thrusters are always on the armour, and the pick up is a tiny silver thing??

[BeckoningZebra1]

I believe Master Chief only has thrusters when he has the thruster pack (yes, the silver thingy)

[RedStarRocket91]

Perhaps it's because Chief is using an older version of the Mjolnir system compared to the Spartan IVs? It could be that, while Chief's armour does have thrusters, without picking up the Armour Ability's hardware module, they're only calibrated to work in zero-gravity and need the external module to override their safety limits. or perhaps it's a fuel container of some sort? The Mjolnir armour might not have its own fuel supply for the thrusters, and so the Armour Ability is actually just a heavily armoured petrol tank, rather than an actual piece of hardware.