Sea mine

Sea mines are explosive naval weapons laid in water to damage, channel, or deter ships and submarines. The cataloged record spans improvised and state mine warfare, from Houthi Red Sea mining in Yemen to Iranian, Iraqi, and Russian mine use or planned mine use in contested maritime corridors.

Image source: Commons Mk 6 Mine Photo

Role in Conflicts

Side: Houthi-aligned forces

During the 2014 Yemen Civil War, Houthi forces used sea mines in the Red Sea and near Bab el-Mandeb, creating area-denial hazards for coalition naval activity, commercial shipping, and local fishing boats.

Role details

Side: Iran
Role in conflict: Persian Gulf tanker-war mining

During the Tanker War phase of the 1980 Iran-Iraq War, Iranian sea mines in the Persian Gulf damaged USS Samuel B. Roberts while it escorted reflagged tankers, prompting U.S. Operation Praying Mantis.

Side: Iraq

In the 1990 Gulf War, Iraqi naval mines damaged USS Tripoli and USS Princeton during coalition mine-clearance and naval operations off Kuwait, showing how minefields complicated amphibious and maritime movement.

Role details

Side: Russia

In the 2014 Russia-Ukraine War, U.S. reporting said Russian forces deployed mines near Ochakiv and mined the Dnieper River, while later U.K. intelligence warned Russia could use sea mines against civilian shipping near Ukrainian ports.

Role details

Profile / Specs

Profile

Origin: Multiple countries
Built by: Various manufacturers
Built in: Multiple
Type: Naval mine
Service note: 19th century to present
Designer: Various naval ordnance designers
Designed: 19th century
Produced: 19th century to present

Specifications

Function: Anti-ship and anti-submarine area denial weapon
Deployment: Can be laid from aircraft, submarines, surface vessels, or small craft depending on the design
Fuzing: May detonate on contact or on magnetic, acoustic, pressure, or other influence cues
Tactical effect: Used to block channels, ports, anchorages, and shallow littoral approaches

Mine Types And Tactical Effects

Sea mines are not a single device class. A minefield can combine simple contact weapons, bottom influence mines, and drifting hazards to slow clearance, close routes, or force ships into predictable channels.

Type	How it threatens ships	Typical use
Moored contact mine	Anchored below the surface and detonated by contact with the hull or mine fittings.	Channel defense, harbor approaches, and shallow-water barriers.
Bottom influence mine	Rests on the seabed and responds to magnetic, acoustic, pressure, or combined signatures.	Harder-to-sweep minefields in ports, straits, and littoral approaches.
Drifting or floating mine	Moves with wind and current after release or after breaking loose from a mooring.	Unpredictable navigation hazard for warships, merchant vessels, and fishing craft.
Limpet mine	Attached directly to a ship hull by divers or small craft rather than laid as a field.	Covert attack against anchored or slow-moving vessels.

Variants

Sea mine categories are usually distinguished by position in the water column, target sensor, and laying method rather than by one universal model line.

Variant	Configuration	Designation notes
Moored contact mines	Anchored anti-ship mine	Buoyant mines tethered below the surface can detonate when a vessel physically contacts the mine casing or its horns. Sources: US Navy Mines Fact File
Bottom influence mines	Seabed influence mine	Bottom mines rest on the seabed and can use magnetic, acoustic, pressure, or combined influence cues to attack ships passing overhead. Sources: US Navy Mines Fact File, National Academies Mine Warfare Overview
Drifting or floating mines	Free-floating hazard	Floating mines can create broad navigation hazards when deliberately released or when moored mines break loose from their anchors. Sources: National Academies Mine Warfare Overview
Limpet mines	Externally attached mine	Limpet mines are attached directly to a target hull rather than laid as a field across a channel or harbor approach. Sources: National Academies Mine Warfare Overview

Timeline

Sea mine Key Events

Apr 14, 1988
Iranian mine damages USS Samuel B. Roberts
During Operation Earnest Will in the 1980 Iran-Iraq War, USS Samuel B. Roberts struck an Iranian mine in the Persian Gulf, leading to Operation Praying Mantis four days later.
Feb 18, 1991
Iraqi mines hit coalition warships
Iraqi mines damaged USS Tripoli and USS Princeton during 1990 Gulf War mine-clearance and naval operations off Kuwait.
Jan 1, 2017
Houthi Red Sea mining emerges
Houthi forces began sowing naval mines near Yemen's Red Sea coast, adding coastal-defense and amphibious-denial hazards to the 2014 Yemen Civil War.
Jun 23, 2022
U.S. reports Russian Black Sea mining
U.S. reporting described Russian mine deployment near Ochakiv and previous mining of the Dnieper River as part of pressure on Ukrainian port access.
Oct 4, 2023
U.K. warns of sea-mine threat to shipping
The U.K. government warned that Russian use of sea mines could target civilian shipping approaching Ukrainian ports in the Black Sea.