The Bureau Audiovisual Archive

Video Dispatches

Documentary investigations, policy debates, field dispatches, and in-depth discussions recorded from the bureau’s studios and field correspondents across South Asia.

Naval destroyer underway near Great Nicobar Island
Video · Investigation28:45
Dispatch LogINS Tarkash Operational Telemetry · Campbell Bay Dredging Berth 04 · Radar Sector 8B Act
Special Documentary Dispatch

The Strait of Malacca Chokepoint: How India’s Great Nicobar Port Shifts Maritime Surveillance

A joint investigative dispatch by Nikhil Sen and the Bureau Maritime Security Desk aboard the INS Tarkash, analyzing naval sensor telemetry, deep-sea dredging timelines, and the strategic repositioning of Indian Eastern Fleet carrier battle groups across the Ten Degree Channel.

Published 29 Oct 2026 · By Nikhil Sen & Maritime Desk
28 min watch · 42.8k views · Subtitles: EN, HI, TA

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Featured Interactive Player · Investigative Deep Dive
Railway tunnel excavation in the Western Ghats
REC · TIME CODE 00:14:28:161080p HD Live
14:28 / 34:10
CC [ENG]
Geological Audit · Special Project Report

Deep Dive: How the Western Ghats Rail Tunnel Balances Geotechnical Risk with UNESCO Forest Preserves

An 18-month forensic review examining water-table ingress, seismological borehole test registries, and acoustic buffering designed to insulate endemic amphibian clusters along the Khandala escarpment.

00:00
Nikhil Sen:

We stand here at Portal 4 above the Karjat gradient. Before drilling commenced, geological teams identified an aquifer channel thirty meters below the proposed ballast line…

04:15
Dr. Vidya Kulkarni (Hydrologist):

The basalt layer in the Deccan traps is notoriously fracture-prone. Without cryogenic grout injection, water infiltration would have depleted three surface springs feeding the river basin.

12:30
Nikhil Sen:

Here is the seismic sensor bank calibrated to 0.02mm/s vibration thresholds to prevent structural reverberation into the evergreen canopy.

21:40
Union Rail Board Liaison:

Every extra kilometer of acoustic insulation increased the capital expenditure by approximately 42 crore rupees, yet protected the UNESCO wildlife buffer zone.

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