VIGIL CONSILIUMSearch
Context. Not headlines.
Equipment catalogue · shared across conflicts

Naval vessel · Diesel-electric attack submarine

Kilo-class submarines (Iran)

The three Russian-built boats acquired in the 1990s — the only conventional submarines of consequence in the Gulf's littoral states, and the Artesh Navy's most survivable and least visible asset, whose condition after three decades and two wars is not established.

Project 877 KiloRussiaDelivered 1992–1996

Status as of
2026-09
Last reviewed
2026-09-09

AssessmentModerate confidence

Recognition context, not a stat sheet. The catalogue covers major publicly documented systems relevant to the conflicts Vigil covers — not an exhaustive order of battle. No quantities, availability or current allocations are recorded.

The recordWhat this system is, where it comes from, who operates it and which of Vigil’s modules it is relevant to — with the evidence each of those rests on.

FieldedEvidence: Documented
Silhouette · not to scale

Record

FamilyProject 877 Kilo
VariantsProject 877EKM; Tareq class (Iranian designation)
OriginRussia
EraDelivered 1992–1996

Conflict relevance

This is the catalogue's single record for this system. It is relevant to the module below; each module's Force Atlas shows how it is used there.

Iran–Gulf · Force Atlas

Operators

Iran and the Gulf · Primary operator

Iran and the Gulf: Three boats of the Artesh Navy, based on the Gulf of Oman side of the strait.

Battlefield role

Sea denial in the Gulf of Oman and the strait's approaches, mine-laying, and a threat that forces every opponent to allocate anti-submarine effort.

Strengths

Quiet, long-endurance boats in water where a single submarine changes an opponent's calculations out of proportion to its number.

Limitations

Thirty-year-old boats maintained under sanctions with Russian support that has itself been intermittent; availability is unknown; and the shallow, confined Gulf is poor submarine water, which is why they are based outside it. No dispositions are recorded.

Documented conflict use

Exercises and deployments published by Iran; no combat use.

Branch & service operators

PartialConfidence: ModerateSources: IISS Military Balance↗ · Iranian armed-forces institutional referenceMethodologyCorrections

Assessed as of2026-09Last reviewed2026-09-09