[Home](/) / [Module](/categories/7-module) / [Projectile Weapon](/groups/55-projectile-weapon) / [280mm Prototype Siege Cannon](/types/9417-280mm-prototype-siege-cannon)

# 280mm Prototype Siege Cannon

Market: [Ship Equipment](/market/9-ship-equipment) / [Turrets & Launchers](/market/10-turrets-and-launchers) / [Projectile Turrets](/market/87-projectile-turrets) / [Artillery Cannons](/market/560-artillery-cannons) / [Small](/market/577-small)

Projectile Weapon · Module · Tech I

## Facts

| Fact | Value |
| --- | --- |
| Mass | 500 kg |
| Volume | 5 m³ |
| Capacity | 0.05 m³ |
| Radius | 20 m |
| Portion size | 1 |
| Base price | 7,496.00 ISK |
| Published | Yes |


## Prices

| Market | Value |
| --- | --- |
| Jita 4-4 sell minimum | 222,100.00 ISK |
| Jita 4-4 buy maximum | 222,000.00 ISK |
| The Forge sell minimum | 222,100.00 ISK |
| The Forge buy maximum | 222,000.00 ISK |
| Sell volume | 182 |
| Buy volume | 9829 |
| Snapshot loaded | 2026-09-07T19:44:09.798Z |
| HTTP last modified | 2026-09-07T18:49:54.000Z |
| Source | esi |


[Order book](/types/9417-280mm-prototype-siege-cannon/prices) · [Price history](/types/9417-280mm-prototype-siege-cannon/history)

## Fitting

| Attribute | Value |
| --- | --- |
| CPU usage | 12 tf |
| Powergrid Usage | 10 MW |


## Structure

| Attribute | Value |
| --- | --- |
| Structure Hitpoints | 40 HP |


## Capacitor

| Attribute | Value |
| --- | --- |
| Activation Cost | 0 GJ |


## Miscellaneous

| Attribute | Value |
| --- | --- |
| Used with (Charge Group) | 83 groupID |
| Charges Per Cycle | 1 |
| Charge size | 1 1=small 2=medium 3=l |
| Meta Level | 3 Level |
| Overload rate of fire bonus | -15 % |
| Reload Time | 10 s |
| Required Thermodynamics Level | 1 Level |
| Tech Level | 1 Level |


## Required Skills

| Attribute | Value |
| --- | --- |
| Primary Skill required | 3302 typeID |
| Secondary Skill required | 3300 typeID |


## Turrets

| Attribute | Value |
| --- | --- |
| Damage Modifier | 8.1 x |
| Accuracy falloff | 8750 m |
| Optimal Range | 11500 m |
| Rate of fire | 10.71 s |
| Turret Tracking | 64 |


## Heat

| Attribute | Value |
| --- | --- |
| Heat Damage | 2.6 HP |


## Materials

| Reprocessing yield | Quantity |
| --- | --- |
| [Tritanium](/types/34-tritanium) | 1,228 |
| [Pyerite](/types/35-pyerite) | 66 |
| [Mexallon](/types/36-mexallon) | 77 |
| [Zydrine](/types/39-zydrine) | 1 |


## Variations

- [280mm 'Jolt' Artillery I](/types/21549-280mm-jolt-artillery-i) (Storyline)
- [280mm 'Scout' Artillery I](/types/9411-280mm-scout-artillery-i) (Tech I)
- [280mm Carbine Howitzer I](/types/9413-280mm-carbine-howitzer-i) (Tech I)
- [280mm Gallium Cannon](/types/9415-280mm-gallium-cannon) (Tech I)
- [280mm Howitzer Artillery I](/types/488-280mm-howitzer-artillery-i) (Tech I)
- [280mm Howitzer Artillery II](/types/2977-280mm-howitzer-artillery-ii) (Tech II)
- [Domination 280mm Howitzer Artillery](/types/13781-domination-280mm-howitzer-artillery) (Faction)
- [Republic Fleet 280mm Howitzer Artillery](/types/16053-republic-fleet-280mm-howitzer-artillery) (Faction)

Links: [Markdown](/types/9417-280mm-prototype-siege-cannon.md) · [JSON](/types/9417-280mm-prototype-siege-cannon.json)