If you’ve spent any time trekking across the post-Death Stranding United Cities of America in the sequel, you’ve probably run into more than a few odd NPCs with very specific skill sets. One of the most underrated but game-changing allies you can add to your network is the Death Stranding 2 aeronautical engineer, a former UCA air force specialist who brings a whole new set of tools to your traversal and delivery toolkit. Most players skip over their early side quests to push through main story missions, but community playtest data shows their upgrades can cut cross-country travel time by 40% or more. This guide breaks down everything you need to know to get the most out of this hidden gem of an NPC.
How to unlock the Death Stranding 2 aeronautical engineer early in your playthrough
You won’t get access to the engineer’s quest line until you complete the third main delivery to the Mountain Knot City outpost, which opens up the western section of the map around Timefall Farm. A yellow “Urgent: Aerial Navigation Equipment Repair” side order will pop up in your mission list, sending you to a small, unmarked shelter 7km west of the farm. The path between the farm and the shelter cuts through a moderate BT hotspot and a few rocky ravines, so pack at least two hematic grenades and a level 2 chiral scanner to avoid unexpected encounters.
Once you deliver the repair parts to the shelter, the engineer will agree to join the UCA network, but you won’t unlock their full upgrade menu right away. Don’t skip the optional follow-up delivery of aerospace-grade lubricant that pops up immediately after you complete the first quest. That second small delivery is what unlocks their first tier of upgrades, rather than just adding their shelter to your map. If you knock this out before you head to the snowy northern regions, you’ll save yourself hours of frustrating climbs up icy slopes later on.
Core skills and upgrades the aeronautical engineer provides
Unlike most UCA allies who only offer one type of upgrade or craftable item, the aeronautical engineer has three separate upgrade trees focused on making your traversal faster, safer, and less stressful. All upgrades use a mix of common materials and chiral crystals, so you won’t have to grind for rare resources to unlock most of their lower tier offerings.
- Portable paraglider upgrades: The first tier upgrades reduce paraglider weight by 30% and add a small cargo hook that lets you carry 2 extra small packages without impacting glide speed. Higher tiers add a wind boost function that lets you gain altitude for 10 seconds at a time, perfect for clearing mountain ridges without wasting time on climbing anchors.
- Crash-resistant cargo casings: These custom 3D-printed casings reduce damage from falls, hard landings, or even BT physical attacks by 75% for fragile cargo. They’re especially useful for medical and food deliveries that break if you so much as stumble on rough terrain.
- Long-range delivery drones: Once you max out the engineer’s friendship level, you unlock drones that can deliver packages up to 15km away, as long as there’s an active UCA network tower in the target area. They can’t carry cargo heavier than 20kg, but they’re perfect for small, non-time-sensitive deliveries that you don’t want to make a whole trip for.
I tested the max tier paraglider on a run from Mountain Knot City to South Knot City recently, and it cut my travel time almost in half, even with a full load of 80kg of construction materials. The only downside is that the wind boost uses up 10 chiral crystals per use, so you’ll want to stock up on those before you take long gliding trips across mountain ranges.
Hidden lore and plot connections tied to the aeronautical engineer
It’s easy to write the engineer off as just a gameplay-focused NPC with no story depth, but their hidden log entries add a lot of context to the game’s larger narrative. Before the second Death Stranding event, they were the lead engineer on the UCA’s first post-apocalypse aircraft program, designed to reconnect isolated cities across the ocean. A massive BT attack destroyed their research facility and killed most of their team, which is why they retreated to the remote shelter and refused to work with the central UCA for years.
If you keep delivering their preferred luxury gifts (vintage flight magazines, freshly roasted coffee, and aircraft model kits) to their shelter, you’ll unlock 12 hidden log entries that fill in more details of their backstory. These log entries also tease a major late-game plot twist involving the source of the new Death Stranding events, so it’s worth taking the time to max out their friendship level even if you don’t care about their gameplay upgrades. You’ll also find a subtle connection to the first game’s Heartman character, who secretly funded their aircraft research before the facility attack.
A lot of players miss that the engineer is the older sibling of the craftsman NPC you meet earlier in the game near Port Knot City. If you have both NPCs on your UCA network, you’ll unlock a special joint upgrade for your backpack that adds a micro-parachute that deploys automatically if you fall more than 5 meters, preventing almost all fall damage for both you and your cargo.
Common mistakes to avoid with the aeronautical engineer
Even if you unlock the engineer early on, it’s easy to waste their upgrades or miss out on their best offerings if you don’t know how their system works. I made most of these mistakes during my first playthrough, so you don’t have to repeat them.
Drones take 2 to 3 times longer to complete a delivery than you would on foot or by vehicle, so never use them for time-sensitive orders. They’re great for standard delivery orders that don’t have a time limit, but you’ll fail urgent orders if you rely on drones to get the job done fast. You should also avoid wasting chiral crystals on the paraglider’s wind boost function when you’re gliding over flat terrain. Only use it when you need to clear a tall obstacle, otherwise you’ll run out of crystals right when you need them most to escape a BT zone or avoid a timefall storm.
Another common mistake is forgetting to check their shelter for new upgrades every time you progress the main story. They unlock new upgrade tiers after every major story event, so stopping by after you finish a main delivery can net you new tools before you head into a difficult new area. I skipped this step for 10 hours of playtime during my first run, and I missed out on the crash-resistant cargo casings before a run where I had to deliver 10 fragile vaccine packs across a rocky BT zone. I broke 3 of them on that run, and it would have been totally avoidable if I’d just stopped by the engineer’s shelter first.
At the end of the day, the Death Stranding 2 aeronautical engineer is one of the most useful allies you can add to your UCA network, offering both massive gameplay quality of life upgrades and fascinating lore that deepens your understanding of the game’s world. Even if you’re the type of player who only focuses on main story quests, taking 20 minutes out of your playthrough to unlock them and their first set of upgrades will pay off for the rest of your game. Don’t sleep on this underrated NPC, you won’t regret the time you put into building up your relationship with them.
