CHART 4111  APPROACHES TO ANSON PORT 

General Information 

     Position, Port Anson lies between Spike Island to the W, and S to at, Mangrova, and Tala Kaicha Islands to the E. Depths of12.8 to 20m exist in the central part of the bay. All of the above islands are reef-fringed.Whales Reef (12°15'.2 N., 92°43'.6 E.) lies about 0.8 mile NW of the S end of Tala Kaichi Island. Two small reefs lie S of this reef.
Foul Bay and Middle Andaman Island are north to the Anson Island these are densely wooded.The NW of the Middle Andaman Islands is indented by numerous inlets and fringed by the mangroves . The coasts is encumbered with islets, rocks and shoals.
Bluff islands. The Islands is 2.6 miles S of Break water Point , is fringed all around by mangroves  and is covered with trees , the tops of which are about 30m high .
South Andaman Islands, The Islands is Between Cape Bluff (12º 13'N, 92º 40'E), a promontory lying 5½ miles SSW of Breaker Point, and Petrie Island, 15 miles SSW, there are no known off lying rocks or shoals. An isolated pinnacle with a depth over it reported as 19.7m is found at position (12º 01'.7N, 92º 35'.1E) in depths above 50 m. 

      Petrie Island, (11º 58'.6 N, 92º 35' E) 21m high, small and surrounded by reefs and shoals lies close NW of Defence Island (11º 57' N, 92º 36' E) a long narrow island forming the E side of the outer Port Campbell. 

      Chauga Juru, The islands is in between Defence Island and the W coast of South Andaman Island. 
  Appoach and entry.

     The low mangrove point at the N end of Stoat Island, just open S of Brooke Point, bearing 112°, leads through the channel N of Spike Island. When within about0.3 mile of Brooke Point, course should be altered to the S passing about midway between Brooke Point and Steep point. After rounding Steep Point, about 0.1 to 0.2 mile distant, course can be shaped for the anchorage. Vessels drawing 4m have navigated the strait. Small vessels with local knowledge should only attempt the passage during daylight hours, under favorable conditions. Such vessels should follow the directions above and steer S in mid-channel through Port Anson until W of the S end of Mangrove Island. The course should then be altered slightly E until the summit of a conical peak, to the N, is seen bearing 003° and just open E of the nearer hills that form the W side of a large mangrove valley. The course should then be shaped to about 183° and these marks kept on the bearing of 003°, astern. This course leads between the ledge of rocks that dries 2.1m and Whales Reef and other reefs to the S of it. 

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When the S end of Tala Kaicha Island bears 090°, the course should be altered to about 220° for the S point of Spike Island, giving a berth of about 0.3 mile to the E side of the strait until about 0.6 mile distant from the S point of Spike island. The course should then be altered to pass 0.2 mile E of that point.
 
When the same point bears 000°, the course should be altered to the S to proceed along the W side of the strait, about 0.2 mile off the W shore.
Limiting Condition

   Depths, The depths at entrance are sufficient. The charted depth at entrance is 22.5
   Tidal Level. Mean spring range about 1.4 m; mean neap range about 0.6 m

Anchorage.—Anchorage can be taken in the N part of Port Anson in depths of 16.5 to 18.3m, mud,about midway between Stoat Island and the N part of Spike Island.
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