Sri Vijaya Puram to Little Andaman I - 405
South Andaman Island   East Side
Between South Point (11° 40’ N, 92° 46’ E) and Chiriya Tapu 11.5 miles SSW the coast is bold and, except for Sesostris Shoal, is clear of dangers outside the fringeing reef.

Chiriya Tapu,  the S point of South Andaman Island and the NE entrance point of Macpherson Strait, is the S end of a distinctive bare promontory with some caves at its base.
A rock 0.3m high lies 0.5 mile W of Chiriya Tapu; vessels should not attempt to pass between this point and the rock.

Rutland Island   E side
Portman Bay, an inlet 4.5 miles SSW of Chiriya Tapu, (11° 29’N, 92° 43’E), has irregular depths in the middle and shallow water and a mangrove swamp at its head. A heavy swell sets into the bay during the NE monsoon.
	Rocks, above and below water, extend some distance off the S coast of Rutland Island and this coast should be given a berth of at least 1.5 miles, except at the E end which is clear outside 0.5 mile offshore.
Rutland Island Light  is exhibited on the S point of Rutland Island. 
Islands Dangers Passages Between Rutland and Little Andaman Islands
Manners Strait (11°20’N., 92°42’E.) lies between the SE coast of Rutland Island and the Cinque Islands, about 3 miles SE. A detached shoal, with a least depth of 12.2m, lies about 4.8 miles W of the N end of North Cinque Island.
A large shoal area, with depths of 10.6 to 18.3m, lies with its shallowest part about 13 miles WSW of the N end of North Cinque Island.
Depths in the strait, seaward of the fringing dangers, range from 21 to 75m.
A shoal with a depth of 5.5m, the existence of which is doubtful, has been reported to lie 6 miles SSW from Rutland Light on the S of the island.
Cinque Islands (11°17’N., 92°43’E.) are two hilly islands which are almost joined by a rocky ledge that dries 1.0m. Two summits, 154 and 145m high, form a saddle near the N end of North Cinque Island. A small, conical, bare hill, 90m high, lies near the S end of the island. A promontory projects WNW from this hill.
North Clique Island Light shows from its N summit.
South Cinque Island, 162m high, has a 117m conical hill near its S end.
Anchorage can be taken in depths of 12.8 to 18.3m, coral and sand, W of the drying ledge which almost joins the two islands, with the W point of North Cinque Island bearing 349°.  Small vessels can anchor off the W side of the South Cinque Island in depths of 23.8m, with the conical hill at its S end bearing 168°, distant 1 mile.
Passage Island (11°11’N., 92°41’E.), 85m high at its N end but low at its S end, lies 3.3 miles SSW of South Cinque Island. A detached rock, 1.8m high, lies about 0.3 mile N of Passage Island. A shoal, with a least depth of 10.9m, lies 2 miles WSW of the end of Passage Island. During spring tides, overfalls form over this shoal. Small patches, with depths of 14.6 to 18.3m, lie S and NE of this shoal.
The channel between South Cinque Island and Passage Island is deep and clear, although tide rips occur during spring tides.
The Sisters (11°09’N., 92°44’E.), two small islets, lie close together about 3.5 miles SE of Passage Island. A ledge connects the islets and a partly drying spit extends about 0.8 mile NW from this ledge. East Sister Island is 76m high and West Sister Island is 54m high.
Duncan Passage (11°04’N., 92°40’E.), lies between The Sisters and North Brother Island, about 10 miles SSW, and is the main channel between Little Andaman and Rutland Islands. Depths in the fairway range from 21.9 to 36.6m.
Shoal ground, with depths of 4.8 to 18.3m, lies between 2 miles WNW and 3 miles NE of the N end of North Brother Island. A 12.3m patch lies about 1.5 miles E of the island.
Patches, having depths of less than 18.3m, lie between 3.3 and 6.5 miles WNW, through 7.3 miles NNW of the N point of North Brother Island.
The Brothers (10°59’N., 92°40’E.), two small flat-topped islands each 27m high, lie 10 and 14.5 miles SSW of The Sisters. Each island is marked by trees and has a lagoon in the middle part. North Brother Island is fringed by a reef which extends 1.8 miles WNW from it.
Foul, unsurveyed ground lies between the two islands.  Leeboard Ledge, a detached shoal, lies about midway between the two islands. Foul ground extends about 5 miles WNW and 1.5 to 2 miles NNW from South Brother Island. In the latter direction, the foul ground terminates in a reef awash which usually breaks. A reef lies SE of the island.
Little Andaman Island (10°42’N., 92°31’E.), the S island of the Andaman group, lies almost 28 miles S of Rutland Island.  The island appears almost level from a distance, but rises gradually to a 210m summit near its centre. The island is well-wooded.
The passage between Little Andaman Island and South Brother Island has not been closely examined and should be avoided.
The low N side of Little Andaman Island is indented by Bumila Creek which is difficult to make out until close off the entrance. A breaking reef extends almost across the entrance.
Anchorage for small vessels with local knowledge can be taken about 0.4 mile N of the creek entrance in a depth of 14.6m, coral, with the entrance bearing 158°. This anchorage should be approached from the NW because the depths to the NE are irregular. The tidal currents set E and SE at the anchorage. A strong ebb sometimes flows out of the creek.
North Sentinel Island (11°33'N., 92°14'E.), separated from the Labyrinth Islands by a wide, deep channel, is 122m high, densely wooded, and has a level ridge which slopes to the low NW point. Depths of 38 to 95.1m are found in this channel.

North Sentinel Island has been reported to be a good radar target up to 13 miles.

No dangers, except those S of the anchorage, exist outside the reef which extends between 0.5 and 0.8 mile from the shore around the island. A dangerous wreck lies about 2.5 miles W of the S part of the island. Constance Islet, 12.2m high, is the largest of four islets which lie on this reef off the SE point of the island.

Anchorage can be taken in a depth of 18.3m, 0.5 mile off the E side of the North Sentinel Island with its NE point bearing 283°. Sunken dangers exist S of this fair weather anchorage.

In fair weather, small vessels with local knowledge can anchor in a depth of 21.9m about 0.5 mile off an entrance through the reef which lies close E of a small islet on the S side of the island. This anchorage lies about 0.8 mile W of Constance Islet.

South Sentinel Island (10°58'N., 92°14'E.), 44m high to the tops of the trees and level topped, lies 15 miles NW of Little Andaman Island. Its appearance is much the same on all bearings. A bank, as defined by the 36.6m curve, surrounds the island and extends about 6 miles NW from it. Considerable depths exist in the channel between this island and Little Andaman Island.

Anchorage can be taken off the W side of South Sentinel Island with its centre bearing 101°, distant 0.9 mile. Anchorage can also be taken off the E side of the island in similar depths with its centre bearing 281°, distant 0.9 mile.

A light is shown on white metal framework tower with red bands, 37m high.