Precautionary measures to avoid the unwanted incident: Suggestion from Chittagong Pilotage Service.
Information for Chittagong Port outer anchorage :
It is because of this reason Ship Masters approaching Chittagong roads are advised not to attempt to cross bow of vessels anchored at close proximity or underway to avoid drifting on them resulting in probable collision/contact with them. In the event if making such an attempt becomes inevitable , Ship Master may do so with caution by giving a wide berth to the vessel at anchor/underway considering the minimum velocity of the current being 6 knots and other marine factors. Vessels at the CPA outer anchorage needs to maintain a deck watch forward and aft.
Nevertheless, we reiterate our conclusion that , for all intent and purpose,CPA outer anchorage cannot be termed as unsafe as all climatic/hydrographic information relating to CPA outer anchorage is being well documented and promulgated by various nautical publications.
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Avoid anchor dragging or collision by Precautionary measures
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The port limit of Chittagong port outer anchorage is bounded by area with radius of 5.6 nautical miles( on the west side) from Patenga light beacon at position Lat. 22 13.54 N long, 91 48.2 E . the anchorage area is divided into three areas which follows-
Anchorage A: the northern most anchorage for vessels of more than 10 meters draught.
Anchorage B: in between anchorage A and c, for vessels scheduled to enter the karnaphuli river within 24 hours.
Anchorage C: the southern most anchorage for lightering vessels and other not scheduled to enter within 24 hours.
Areas outside the marked anchorage are considered o be off port limit. the shallow patch lies SW of the anchorage. this is the usual approach area for A and B anchorage. The minimum charted depth of 7.9 m lies in about two places over the shallow path. Most of the places having charted depth in excess of 8.5 m. The height of tide at low water and high water usually varies from 0.4m to 1.5m an 2.4 m to 4.6m respectfully during the year..