Storm Cannon
| “ | A heavy fixed position artillery piece that can release devastating firepower on distant enemy targets. | „ |
| — In-game description |
The Storm Cannon is a Bunker modification with a large player-controlled powered artillery piece that fires 300mm shells over very large distances, even into other regions.
Construction
The Storm Cannon costs 200 Concrete Materials to build.
It can only be built on the center piece of a 3 by 3 Bunker Network with the following requirements:
- The bunkers in the 3x3 square must all be Tier 3 and have no bunker modifications (except Storage Rooms and Infrastructure Modifications). The center of the 3x3 cannot have any modifications whatsoever, it cannot have storage rooms, or infrastructure. The corner pieces can be Tier 3 Bunker Corners
- The bunker at the center of the square must be fully cured, the other ones don't need to be dry.
- Connected to a Bunker Base through trenches or bunkers
- Bunker Base must have unlocked the Advanced Bunkers
upgrade(requires 40 "Command" Infrastructure Modifications).
It is visible on the world map for both factions at all times, with its own unique icon 
.
Structural Integrity
The Storm Cannon modification greatly decreases the Structural Integrity of its Bunker Network.
Concrete Settling
It must dry for 48 hours before it can be used, instead of the usual 24 hours that every other concrete structure has. The duration increases during Snow Storms and Rain Storms depending on their intensity (up to double with highest intensity).
While very sturdy when dry, it is vulnerable while still wet. The vulnerability depends on how wet the concrete is and functions as a damage multiplier. Wet concrete that's just been placed has a x10 damage multiplier compared to dry concrete. After 8 hours the damage multiplier is roughly x3, and x2 after 12 hours.
Reservation
Any player can reserve it for a Squad via a button 
in the interface if there are at least 5 squad members in the region. The reservation prevents non-members from getting in the operator seat. The reservation lasts 52 hours, it cannot be refreshed (except by removing it and readding it) but can be reapplied after it expires.
Destruction
It is immune to friendly fire.
When destroyed it leaves behind a simple Tier 3 Bunker husk.
Structure Event Log
In its interface you can click the "View Actions Log" button 
to view a list of recent events, with timestamps and player names displayed. Events recorded include modifications, players entering or exiting it, players firing the canon but not range or azimuth changes. The log only displays the last 128 events (8 pages).
Use
Its interface can be accessed by soldiers inside the bunker by pressing E.
Weapon Platform
Controls:
- Access the seat via the central pillar inside the bunker
- Controls the movement, reloading, and firing of the cannon
- Rotates the cannon with
RMB - Adjust the range with
Mouse Scroll Wheel
Armament:
- Storm Cannon
- Built on a bunker (can rotate 360 degrees)
- Ammo Used: 300mm
- Range: 400-1000 meters
- Reload Duration: 4.5 seconds
- Firing Duration: 1.5 seconds
- Fire Rate: 10 per minute
- Accuracy: 50m radius at minimum range up to 50m at max range (not including Wind effect)
- Can fire into other regions, but not into the Rapid Decay Zone near the borders.
Inventory:
Its inventory can only hold one 300mm shell, accessible at the central pillar below the cannon inside the bunker.
Power Consumption
Using the Storm Cannon consumes power from its reserve power pool:
- Firing consumes 2% power
- Adjusting azimuth by 1 degree consumes 3.6% power
- Changing the distance does not consume power
The power costs of firing and turning can be reduced by installing certain Infrastructure Modifications in Bunkers connected to the Intelligence Center by Trenches or Bunkers. Each modification reduces the cost by 1% and the total reduction can't go beyond 20%.
The reserve power pool is recharged by Engine Rooms connected to the Storm Cannon through pipes modifications. One Engine Room recharges 1% of power every 24 minutes. Up to 12 connected Engine Rooms (35 kW) can supply power to recharge the reserve power pool. The Storm Cannon's menu shows the reserve power gauge and indicates whether it is currently recharging.
Tactics
Like other artillery pieces, its inventory only holds a single shell, so a new shell must be submitted every time it is reloaded. It takes at least one dedicated loader to fire it at the maximum rate.
Since turning the gun rapidly depletes its power, the Storm Cannon can take days to reorient, and should mostly be left facing the same general direction, with only small adjustments to account for wind or precise targeting.
A fully charged Storm Cannon is able to fire a barrage of about 50 shots (without turning), and takes at least 3 1/3 hours or 200 minutes to recharge with the max number of engine rooms (12).
The cannon firing is heard by everyone in the region it's in and everyone in the region it's firing at.
Despite the gunner seat being outside next to the cannon, the player in it cannot be hit by incoming fire, but they can freeze to death.
Gallery
A fully constructed Storm Cannon
The interface of a Storm Cannon
A battery of Storm Cannons
The lower section of a Storm Cannon owned by the Wardens
