The afterburner in DREADMOOR is a boat upgrade described as providing a burst of speed when danger closes in. That confirms its intended role, but it does not establish an unlock quest, crafting recipe, activation key or numerical speed increase.
What the upgrade is meant to do
The trawler is your means of travelling through the flooded Submerged Lands. Its upgrades include several components with different jobs: an engine and propeller for movement, hull reinforcement for protection, a spotlight for darkness and a canister rack for spare fuel.
The upgrade description confirms the speed-burst role, without giving an unlock recipe or activation key.
The afterburner belongs to that upgrade system as a speed-burst option. It should not be treated as another name for every engine improvement. Installing an upgraded engine during a demo quest does not, by itself, prove that an afterburner has been unlocked.
Details to verify in your build
If the afterburner appears in your installed build, use its actual blueprint and component description to check requirements and behaviour. The current information does not establish its material quantities, currency cost, fuel consumption, cooldown or duration.
There is also no verified activation binding to print here. A key shown in a video could reflect a different build or a player's changed controls. Check the control instructions associated with the component you actually have.
Keep the two meanings of Afterburner separate
Some search results use Afterburner to mean PC monitoring software. A frame-rate overlay or benchmark title does not explain the in-game boat component. Likewise, the presence of the component in promotional copy does not establish a particular GPU tool's compatibility.
For the boat upgrade, the useful confirmed distinction is a short speed burst rather than a permanent engine statistic. More specific installation or usage instructions need the matching build's interface; they cannot be reconstructed from the feature description alone.