ANCHORING AND TRAWLING
Ships are prohibited from anchoring and trawling in the area marked by packed line due to the existence of oil and gas pipelines carrying flammable material under high pressure or the submarine cable of high voltage. Mariners risk prosecution if they anchor or trawl near pipeline or a cable and so damaged it. Any ship damaging them could face in an immediate hazard. Mariners are strongly advised not to anchor or trawl in the vicinity of pipelines or the submarine cable. See Indian Notices to Mariners Special Edition Notice No.14.

OILFIELD DEVELOPMENT AREA
Numerous production platforms, underwater construction work on well heads and pipelines, single buoy moorings and oil derricks, only some of which carry lights, fog signals, other unlit objects and submerged obstructions, oil barges, drilling rigs, diving tenders and support vessels exists within the Oilfield Development Area enclosed by pecked lines. As all these features can not be charted, special caution should be exercised by vessels navigating in the vicinity. Vessels are advised not to enter these areas and those entering will do so at their own risk for which Government of India will not be liable in any way. The Government of India has established 500 metres Safety Zone around each installation in these Oilfield Development Areas. Mariners should not enter these Safety Zones. For details see Indian Notices to Mariners Special Edition Notice No.21.