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Ten Degree Channel: Andaman & Nicobar Maritime Gateway GK

The Ten Degree Channel is a prominent oceanic strait situated in the eastern Indian Ocean along the 10° North parallel of latitude (10°00' N). As a fundamental geographical and administrative landmark of the Indian subcontinent, the channel physically divides the Andaman and Nicobar Islands Union Territory of India into two major island groups: the Andaman archipelago to the north and the Nicobar archipelago to the south. Specifically, the waterway separates the southern coastline of Little Andaman Island from the northern tip of Car Nicobar Island across a wide span of approximately 145 to 150 kilometers (roughly 90 to 93 statute miles or 80 nautical miles).

Hydrographically, the Ten Degree Channel represents a deep ocean passage connecting the expansive waters of the Bay of Bengal on the west with the semi-enclosed Andaman Sea on the east. Unlike shallow coastal straits, the channel features substantial bathymetric depths ranging from 700 meters to more than 1,000 meters across its central navigable trough. This depth permits unobstructed navigation for large commercial container vessels, crude oil supertankers, and naval surface combatants. The channel acts as a primary international maritime artery, accommodating east-west global trade routes connecting the Persian Gulf, Red Sea, and Indian mainland with the Strait of Malacca, Singapore, and East Asian economies.

From an ecological and strategic perspective, the Ten Degree Channel occupies an essential position in India’s maritime architecture. The islands flanking the channel host unique ecosystems and vulnerable indigenous communities: Little Andaman to the north is inhabited by the indigenous Onge tribe, while Car Nicobar to the south is populated by the Nicobarese community. Strategically, the channel is patrolled by the Andaman and Nicobar Command (ANC)—India’s unified tri-service command established in 2001 at Port Blair. Operating naval vessels, maritime patrol aircraft, and forward air bases such as INS Kohassa and INS Baaz, the Indian Armed Forces maintain continuous surveillance across this gateway to safeguard sea lines of communication and monitor international submarine movements.

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The Ten Degree Channel is a deep oceanic passage located along the 10° North parallel of latitude in the Indian Ocean.
The channel functions as the official geographical divide separating the Andaman Islands group to the north from the Nicobar Islands group to the south.
Specifically, it separates Little Andaman Island in the north from Car Nicobar Island in the south.
The channel spans a width of approximately 145 to 150 kilometers (roughly 90 to 93 miles or 80 nautical miles) between the two islands.
The central navigational trench exhibits profound bathymetric depths, generally ranging between 700 and 1,000 meters.
The channel provides a direct navigable connection between the Bay of Bengal to the west and the Andaman Sea to the east.
It represents one of the world's most heavily traversed international sea lanes, connecting European and West Asian shipping to the Malacca Strait.
Commercial container vessels, bulk mineral carriers, and crude oil tankers navigate the channel on voyages between Singapore and Indian Ocean ports.
Little Andaman, bordering the channel to the north, is the ancestral homeland of the indigenous Onge, a Particularly Vulnerable Tribal Group (PVTG).
Car Nicobar, bordering the channel to the south, is the northernmost island of the Nicobar district and administrative hub of Car Nicobar tehsil.
The channel experiences pronounced weather variations, generating rough sea swells during the onset of the southwest and northeast monsoons.
Duncan Passage lies north of the Ten Degree Channel, separating Little Andaman from Rutland Island across a narrower 48-kilometer gap.
South of the Ten Degree Channel, the Sombrero Channel separates Little Nicobar Island from Nancowry Island.
Further south, the Great Channel (Six Degree Channel) separates Great Nicobar (Indira Point) from the Indonesian island of Sumatra.
Security and surveillance across the channel are directed by the Andaman and Nicobar Command (ANC), India's unified tri-service command founded in 2001.
Indian naval air bases, including INS Kohassa in North Andaman and INS Baaz at Campbell Bay, maintain continuous aerial reconnaissance over the channel.
The administrative boundary between the South Andaman District and the Nicobar District follows the geographical alignment of the Ten Degree Channel.
Geologically, the channel lies within an active seismic zone formed by the subduction of the Indo-Australian Plate beneath the Burma Microplate.
The catastrophic 2004 Indian Ocean tsunami caused major coastal inundation along the islands immediately bordering the Ten Degree Channel.
The nutrient-rich deep waters of the channel support abundant marine life, including yellowfin tuna, billfish, and marine mammals.
The Indian Coast Guard deploys offshore patrol vessels (OPVs) to conduct counter-poaching and search-and-rescue operations across the channel.
Comparative questions contrasting the 8° Channel (India-Maldives), 9° Channel (Minicoy-Lakshadweep), and 10° Channel (Andaman-Nicobar) are classic exam questions.

Ten Degree Channel: Andaman & Nicobar Maritime Gateway GK

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