Strait of Hormuz

Topic: World Physical Features and Natural Regions · NCERT: Beyond NCERT

Meaning

The Strait of Hormuz is a narrow sea passage between Iran to the north and Oman's Musandam peninsula to the south. It links the Persian Gulf with the Gulf of Oman and the Arabian Sea. About one-fifth of the world's oil passes through it, along with a lot of LNG (liquefied natural gas). This makes it one of the world's two busiest oil chokepoints, and a lifeline for India's crude oil and LPG imports.

Explanation

Why it is a strait and a chokepoint

• A strait is a narrow strip of sea that joins two larger seas. It has land on both sides.

• At Hormuz, the land on the two sides is Iran and Oman (Musandam).

• A chokepoint is a narrow sea passage that a large share of world shipping must use.

• What happens if a chokepoint is blocked:
• Ships must take long detours, or they cannot leave at all.
• Freight and insurance costs go up.

• Fuel prices go up.

• Hormuz is a strong chokepoint because it is the only sea route out of the Persian Gulf. The Gulf has no other exit to the open ocean.

The geography on its two shores

• North shore: Iran.
• South shore: Oman's Musandam peninsula. This piece of Oman is cut off from the rest of the country by UAE territory.
• Inner side: the Persian Gulf, an almost closed sea surrounded by the big oil-producing states.
• Outer side: the Gulf of Oman, which opens into the Arabian Sea and the Indian Ocean.

What flows through it

• Who uses it: Iran, Iraq, Kuwait, Saudi Arabia and the UAE send most of their oil exports through it [4].
• Oil: about one-fifth of the world's oil.
• A recent estimate: about 20.3 million barrels a day. That is roughly a quarter of the oil traded by sea (Britannica, mid-2020s) [4].
• Gas: a lot of LNG also passes through it.
• Ranking: Hormuz and Malacca are the two busiest oil chokepoints [5].

The 2026 crisis: what a blockage looks like

• Cause: in late February 2026, the US and Israel bombed Iran. Shipping through Hormuz became unsafe.
• Result: by April 2026, up to 20,000 seafarers on about 2,000 ships were stranded inside the Persian Gulf [3].
• The IMO (International Maritime Organization, the UN body for shipping) Secretary-General said that "civilian seafarers are not combatants" [3].
• In April 2026 the IMO named Hormuz as one of six waterways that conflict can easily disrupt [3]. The other five are the Suez Canal, the Bab-el-Mandeb Strait, the Straits of Malacca and Singapore, the Turkish Straits and the Panama Canal.

Where it occurs

• World location: at the mouth of the Persian Gulf in West Asia. Iran is to the north and Oman (Musandam) is to the south.
• Waters it links: Persian Gulf → Strait of Hormuz → Gulf of Oman → Arabian Sea.
• Countries that depend on it to export: Iran, Iraq, Kuwait, Saudi Arabia and the UAE [4].
• India's link:
• A large share of India's crude oil and LPG imports comes through Hormuz. It then crosses the Arabian Sea to India's west coast.
• Operation Sankalp: a maritime security operation the Indian Navy began in the Gulf region on 19 June 2019. It keeps Indian-flagged ships safe as they pass through Hormuz [2].
• By mid-2022, 36 warships had been deployed under it. They escorted about 453 Indian-flagged merchant ships carrying about 361 lakh tonnes of cargo [2].

Don't confuse with

• Bab-el-Mandeb: joins the Red Sea with the Gulf of Aden, between Yemen and Djibouti/Eritrea. It is the third-busiest oil chokepoint (about one-tenth of oil traded by sea) [5]. Hormuz is between Iran and Oman and is one of the top two.
• Strait of Malacca: joins the Andaman Sea with the South China Sea, between the Malay Peninsula and Sumatra. It is China's main oil route (the "Malacca dilemma"). Hormuz is where Gulf oil leaves. Malacca is a route that oil travels on to East Asia.
• Persian Gulf vs Gulf of Oman: the Persian Gulf is the closed sea inside the strait. The Gulf of Oman is the open water outside it, leading to the Arabian Sea.
• Strait vs channel: a channel (for example, the Mozambique Channel) is also a sea passage between two land masses, but it is usually wider than a strait.

Prelims Hooks

• Hormuz: the countries on its sides. Iran (north) and Oman's Musandam peninsula (south). It is not the UAE, even though UAE territory separates Musandam from the rest of Oman.
• Hormuz joins the Persian Gulf with the Gulf of Oman and the Arabian Sea. It is the only sea route out of the Persian Gulf [4].
• Oil chokepoints by rank: Hormuz and Malacca are the busiest. Bab-el-Mandeb is third [5].
• Oil flow: about 20.3 million barrels a day, roughly a quarter of the oil traded by sea [4].
• Operation Sankalp began on 19 June 2019 to protect Indian-flagged ships passing Hormuz [2].
• IMO list (April 2026): Hormuz is one of six waterways that conflict can easily disrupt [3].

Mains Points

• Energy security (GS-III):
• A large share of India's crude oil and LPG comes through this one strait.
• The 2026 crisis stranded up to 20,000 seafarers on about 2,000 ships [3]. It showed that one blocked strait can stop supply.

• India's responses: strategic petroleum reserves, buying oil from more countries, and naval escort under Operation Sankalp [1][2].

• Geography creates the risk (GS-I):

• The Persian Gulf is an almost closed sea, and Hormuz is its only exit. So the oil exports of Iran, Iraq, Kuwait, Saudi Arabia and the UAE all pass one narrow point [4].

• Any conflict there raises freight costs, insurance costs and fuel prices around the world.

• India as a maritime power (GS-III):

• The Navy's escort work, from Hormuz in 2019 to the Red Sea and Gulf of Aden from December 2023, shows India acting as a net security provider (a country that keeps the sea safe for others, not only for itself) [1][2].

Related concepts

• Bab-el-Mandeb
• Strait of Malacca
• Mozambique Channel
• Strait of Gibraltar
• Bosphorus
• Turkish Straits
• Kerch Strait
• Taiwan Strait
• Bering Strait
• Drake Passage

Read more

• Straits and chokepoints