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By 1979, the IIN had three battalions of marines.
=== Power ===
As of 1978–1979, Iranian Navy had the following equipment:
{| class=wikitable style=text-align:center
|-
!colspan=2|[[Military personnel|Pesonnel]]
|-
|align=left|Total forces||~22,000
|-
!colspan=2|[[Naval ship|Vessels]]
|-
|align=left|[[Destroyer]]||3
|-
|align=left|[[Fast frigate]]||4
|-
|align=left|[[Corvette]]||4
|-
|align=left|[[Coastal minesweeper]]||3
|-
|align=left|Inshore minesweeper||2
|-
|align=left|[[Patrol boat]]||17
|-
|align=left|[[Hovercraft]]||14
|-
|align=left|[[Landing ship]]||2
|-
|align=left|[[Landing craft]]||1
|-
|align=left|[[Auxiliary ship|Fleet supply ship]]||2
|-
|align=left|[[Repair ship]]||1
|-
|align=left|[[Imperial Yacht]]||2
|-
|align=left|[[Replenishment oiler|Oiler]]||2
|-
|align=left|[[Survey vessel]]||3
|-
|align=left|[[Water carrier]]||1
|-
|align=left|[[Tugboat|Tug]]||3
|-
|align=left|Coastguard Cutter||30
|-
|align=left|Custome craft||2
|-
!colspan=2|[[Naval aviation]]
|-
|align=left|Aircraft||12
|-
|align=left|Maritime helicopter||36
|-
!colspan=4 align=left|Source: The Statesman's Year-Book<ref name="Statesman's">{{citation|title=The Statesman's Year-Book 1978–79|editor-first=|editor-last=|entry=IRAN: Keshvaré Shahanshahiyé Irân|publisher=Springer|year=2016|isbn=9780230271074|pages=674–682}}</ref>
|}
==Islamic Republic of Iran==
With the fall of the Shah in the revolution of 1979, the Imperial Iranian Navy was renamed as the [[Islamic Republic of Iran Navy]] (IRIN). From then on, the United States imposed economic sanctions and an arms embargo, severely hampering Iran's ability to maintain and equip its navy. In fact, the navy was more severely affected than Iran's army or air force. Several of Iran's ships had to be laid up. Since 1979, the number of marines in the Islamic Republic of Iran Navy has expanded to, 2,600 personnel, in two marine brigades, each composed of three battalions. These two brigades have also been reported as three battalions in the IRIN (which may be part of the [[Islamic Republic of Iran Army]]).
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