Sea Mine
| “ | Designed for underwater deployment, Sea Mines detonate upon contact with enemy vessels. They deteriorate after 48 days. | „ |
| — In-game description |
The E680-S Rudder Lock is a large deployable Sea Mine used against underwater Naval Vehicles, such as Submarines.
Description
The E680-S Rudder Lock is a large explosive that is deployed in deep water at a depth between 15 and 30 meters in a 4s animation. It only detonates on contact with any armored vehicle, friendly or enemy. The explosion deals 1350 High Explosive damage in a 7.5m radius. As a Large Item, the player can only carry one in their large item slot, occupying their hands.
It is designed specifically as an anti-submarine tool, to kill them or prevent them from accessing an area.
It cannot be deployed in shallow waters, near Region borders (within the 60m no-build zone), or less than 5 meters from another Sea Mine.
When deployed it is always visible to everyone unlike other mines. It appears as a green silhouette if deployed by allies and in red if deployed by enemies.
A deployed mine despawns after 48 hours if it isn't triggered, even when placed in Rapid Decay Zones.
Usage
Large Item Handling
It can be picked up from the ground with V and dropped on the ground with V (or Shift+V if another "V" interaction is available). It can be submitted to a structure/vehicle's stockpile or inventory with V or by clicking the "Submit Large Item" 
button in their interface. It can be retrieved from a Material Pallet, Rooster - Tumblebox, or Storage Room by pressing V without having to open their interface. It is automatically dropped if the player draws a weapon or equipment.
Deploying the mine
- Equip the mine
- Aim at the desired location (must be within 15 meters of player) - hold
RMB - Select the desired deployment depth (between 15 and 30 meters) -
Mouse Scroll Wheel - Deploy the mine - press
LMB - After a 4s deployment animation that immobilizes the player the mine is deployed
- The mine becomes active 3 seconds after being deployed (any targetable vehicle in the detection radius can only trigger it if they leave the detection radius and enters it back)
Production
| Structure | Input(s) | Output | Time |
|---|---|---|---|
 Ammunition Factory | 1 x Construction Materials  8 x Heavy Explosive Powder  4 MW of power  | 1 x E680-S Rudder Lock  | 00:01:30 |
Tier 2 Facilities must be fully researched in the Weapons and Structure 
Tech Tree in order to be produced.
Individual Sea Mine in personal orders can be retrieved as reservable crates from a logistics vehicle with RMB > "Retrieve as crate" (1 per crate).
Storage
It does not stack in inventories (1 per slot) except in ammo slots dedicated to it in certain vehicle or structure inventories (varying stack sizes).
It can be stored in stockpiles of Bases (32k max) but also in Material Pallets (60), Rooster - Tumblebox Trailer (20), Material Transfer Stations (1000), Small Flatbed Car (50) or Storage Rooms (100).
Crates of E680-S Rudder Lock can be directly submitted to any item stockpile that accepts that item to transfer their content.The crates can also be stored in the crate stockpiles of Storage Depots (1000 public, 100 per Reserve Stockpile), Seaports (1000 public, 100 per Reserve Stockpile), Shipping Containers (60), or Storage Ships (1000).
It can be transported by almost any vehicle with inventory slots, but is most commonly transported by Trucks, Small Flatbed Car, or shipping vehicles carrying Material Pallets. Delivering it in crate form is possible but extremely inefficient.
Tactics
Given its minimum depth of 15 meters a submarine can avoid mines by going close to the surface.
Deploying Sea Mines next to a destroyed drawbridge ensures that Submarines won't be able to pass through.
Since any armored vehicle can trigger the mine, including tanks that fall into the water, this can sometimes be used to (expensively) clear a path through a minefield.
Trivia
- When the E680-S Rudder Lock was introduced in 1.54 Naval Warfare, it was Colonial-exclusive. This was due to them not having any ships that could trigger them. This was changed in Update 1.56, when the Colonials got their submarine, meanimg that Wardens had a underwater vehicle they could attack with Sea Mines.
Gallery
A Colonial soldier holding a E680-S Rudder Lock
A Material Pallet containing E680-S Rudder Locks
Sea Mines appear in green if deployed by allies and red for enemies. Both kinds are dangerous to all Submarines
Render Models of the Torpedo, Depth Charge, and Sea Mine shown in the Naval Warfare Dev Stream
• Coal 
• Components 
• Copper 
• Damaged Components 
• Iron 
• Rare Metal 
• Salvage 
• Sulfur 
• Wreckage 
• Assembly Materials II 
• Assembly Materials III 
• Assembly Materials IV 
• Assembly Materials V 
• Barbed Wire 
• Concrete Materials 
• Metal Beam 
• Pipe 
• Processed Construction Materials 
• Rare Alloys 
• Sandbag 
• Steel Construction Materials 
• Thermal Shielding 
• Unstable Substances 
