<h5 data-path-to-node="8"><b data-path-to-node="8" data-index-in-node="0">Transforming Estuarine Navigation into a Round-the-Clock Waterborne Highway</b></h5><p data-path-to-node="9"><b data-path-to-node="9" data-index-in-node="0">KOLKATA / HALDIA</b> — In a major technical milestone aimed at unlocking round-the-clock commercial river transits and eliminating tidal waiting bottlenecks across eastern riverine systems, the Syama Prasad Mookerjee Port Kolkata (SMPK), in coordination with the Inland Waterways Authority of India (IWAI), has formally commissioned a continuous <b data-path-to-node="9" data-index-in-node="342">Night-Navigation Sonar and Dynamic Bathymetric System</b> across the lower Hooghly River and Indo-Bangladesh Protocol (IBP) shipping routes.</p><p data-path-to-node="10">The navigational suite addresses one of the most volatile hydrographic stretches in South Asia. Historically, heavy siltation, migratory sandbars, and unpredictable tidal bores across the Hooghly estuary restricted commercial river barges, coastal bulk carriers, and container vessels to daytime-only transit windows. By deploying fixed and mobile sonar arrays paired with high-frequency AIS data relays, SMPK has enabled seamless 24/7 navigation between Kolkata Dock System (KDS), Haldia Dock Complex (HDC), and key riverine discharge terminals in Bangladesh, compressing vessel turnaround cycles by 36 hours.</p><h5 data-path-to-node="12"><b data-path-to-node="12" data-index-in-node="0">Technical Architecture, Real-Time Sonar Mapping &amp; Shore Telemetry</b></h5><p data-path-to-node="13">The operational suite combines multi-tier acoustic tracking, automated tide gauge telemetry, and encrypted digital navigational broadcasting:</p><ul data-path-to-node="14"><li><p data-path-to-node="14,0,0"><b data-path-to-node="14,0,0" data-index-in-node="0">Differential Multi-Beam Bathymetric Sonars:</b> High-precision sonar beacons anchored along dynamic shoaling channels continuously monitor riverbed silt migration and channel depths, refreshing fairway profiles every 15 minutes.</p></li><li><p data-path-to-node="14,1,0"><b data-path-to-node="14,1,0" data-index-in-node="0">Encrypted VHF-AIS Data Feeds:</b> Real-time channel depth coordinates and hazard contours are pushed directly to onboard Electronic Chart Display and Information Systems (ECDIS) aboard commercial barges via dedicated coastal Automatic Identification System (AIS) frequencies.</p></li><li><p data-path-to-node="14,2,0"><b data-path-to-node="14,2,0" data-index-in-node="0">Solar-Powered Smart Buoy Chains:</b> Luminous navigational buoys outfitted with dynamic LED range lights and acoustic transponders demarcate safe transit drafts of up to 3.2 meters, guiding mariners through narrow curves even during dense nocturnal fog and heavy monsoon showers.</p></li><li><p data-path-to-node="14,3,0"><b data-path-to-node="14,3,0" data-index-in-node="0">Integrated Shore Command &amp; Control:</b> A 24/7 centralized Vessel Traffic Management System (VTMS) hub at Kolkata Port monitors barge spacing, tidal surges, and speed curves in real time, preventing groundings and coordinating pilotage handovers.</p></li></ul><h5 data-path-to-node="16"><b data-path-to-node="16" data-index-in-node="0">Synergies with Indo-Bangladesh Protocol (IBP) and Eastern Multimodal Trade</b></h5><p data-path-to-node="17" id="p-rc_9166b23654b95224-214"><span data-path-to-node="17,0">The night-navigation grid serves as a critical operational catalyst for bilateral trade under the framework of the <b data-path-to-node="17,0" data-index-in-node="115">Indo-Bangladesh Protocol on Inland Water Transit and Trade (PIWTT)</b> and the <b data-path-to-node="17,0" data-index-in-node="190">Jal Marg Vikas Project (JMVP)</b></span><span data-path-to-node="17,1"><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><source-footnote _nghost-ng-c931024985="" class="ng-star-inserted"><sup _ngcontent-ng-c931024985="" class="superscript"><!----></sup></source-footnote><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----><!----></span><span data-path-to-node="17,2">:</span><sources-carousel-inline ng-version="0.0.0-PLACEHOLDER" _nghost-ng-c2043504548=""><!----></sources-carousel-inline></p><ul data-path-to-node="18"><li><p data-path-to-node="18,0,0"><b data-path-to-node="18,0,0" data-index-in-node="0">Accelerating Heavy Bulk Evacuation:</b> Dedicated barges moving fly ash, finished steel, cement clinker, and industrial minerals from industrial hubs in West Bengal, Jharkhand, and Odisha can now complete non-stop sailings toward Narayanganj, Mongla, and Dhaka without overnight anchor stalls.</p></li><li><p data-path-to-node="18,1,0"><b data-path-to-node="18,1,0" data-index-in-node="0">Boosting Containerized Cargo Flows:</b> Sourcing desks and apparel manufacturing houses in Bangladesh gain faster, predictable connectivity to transshipment vessels calling at Kolkata and Haldia, bypassing congested land border gates.</p></li><li><p data-path-to-node="18,2,0"><b data-path-to-node="18,2,0" data-index-in-node="0">Cost Compression and Fuel Savings:</b> Eliminating multi-hour anchoring intervals waiting for daylight or favorable tidal windows lowers fuel consumption per trip by up to 18%, significantly trimming vessel-operating costs for regional fleet operators.</p></li></ul><p data-path-to-node="19">Speaking during the operational flag-off in Kolkata, port leadership stated:</p><blockquote data-path-to-node="20"><p data-path-to-node="20,0"><i data-path-to-node="20,0" data-index-in-node="0">"The commissioning of dynamic night-navigation sonar technology transforms the Hooghly estuary and Indo-Bangladesh inland water routes from daylight-dependent channels into continuous, predictable commercial logistics conduits. By eliminating navigational blind spots and nocturnal halts, SMPK is expanding cargo-handling velocity, lowering logistics costs for bilateral trade, and reinforcing Eastern India's role as a vital maritime gateway for the subcontinental hinterland."</i></p></blockquote><h5 data-path-to-node="22"><b data-path-to-node="22" data-index-in-node="0">Fleet Readiness and Commercial Implementation</b></h5><p data-path-to-node="23">Under the initial implementation phase, over 120 registered inland and coastal barges operating along the Kolkata–Mongla and Kolkata–Narayanganj routes have been integrated into the digital night-navigation broadcast network. The port authority confirmed that technical hydrographic units will conduct weekly calibration reviews to expand sonar coverage to peripheral feeder tributaries throughout the upcoming winter dry season.</p>