A proposal, currently under discussion, is for the pipeline to run from Nagapattinam in Tamil Nadu to Jaffna in Northeast Sri Lanka.

Source: https://www.onlanka.com/news/sri-lanka-and-india-to-begin-talks-on-petroleum-pipeline.html

“So far, around 900 transponders have been fixed on boats in Chennai, Cuddalore, Nagapattinam, Thoothukudi and Colachel.

Source: https://www.thehindu.com/news/cities/chennai/600-fishing-boats-in-chennai-fitted-with-transponders-with-isro-technology/article66983311.ece

The Boat Mail had a much greater expanse than the 64-nautical-miles-long ferry route (74 miles) between Tamil Nadu’s Nagapattinam and Jaffna’s Kankesanthurai.

Source: https://indianexpress.com/article/research/once-upon-a-time-a-train-that-brought-india-lanka-closer-9004108/