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Sector 9. The Bismarck Archipelago

9.72 Between Sopa Sopa Head and Mosely Point, the coast

is indented by Shallow Bay, which is encumbered with mud banks. A number of low, flat, and densely-wooded islets are in the entrance of the bay. Higham Island, located nearly 1.5 miles E of Sopa Sopa Head, is planted in coconut palms. The head is rocky and fringed by a reef that extends about 0.5 mile offshore. Within the head, the land rises in a gradual slope to a saddle hill, 148m high, about 2.5 miles S of the point.

9.72

A group of three islands are about 5 miles WNW of Sopa

Sopa Head. Mosely Island (Massong Island) and Buchanan Island (Bulumara Island) are on the same reef. Murray Island (Palawat Island) is detached and is surrounded by a wide fringing reef. All of these islands are covered with coconut palms. Considerable shoal water extends S from the group. Harengan Island, 1.5 miles N of Sopa Sopa Head, is 51m

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high and densely wooded. On the W edge of the reef surround- ing the island is Twin Rocks, about 6m high.

9.73 Nares Harbor (1°57'S., 146°39'E.), in the lagoon off

the W end of the N coast of Manus Island, is formed by the reef-fringed shore, E of Mosely Point, two reef-fringed islands on the W, and Marengan Reef on the N. The harbor is sheltered, because the islands and reefs form a natural break- water. The S shore of the harbor, E of Mosely Point, is reef fringed to a distance of 1 mile. A small promontory is about 2.5 miles ESE of Mosely Point.

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A considerable tidal current has been observed to set E and

W in the harbor without any perceptible rise or fall. Depths in the harbor vary between 18m and 57m.

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Marengan Reef, which forms a natural breakwater, consists

of two parts. The N edge of the reef is defined and has few apparent off-lying dangers. The S edge is not defined. It has several mushroom rocks cropping up close to it, with deep water around. Two sandy islands, 24 to 30m high, stand on the W part of the reef. Marengan Island, densely wooded and having some coconut palms, has a village on its N side. Sori Island, which lies near the E end of the E part of the reef, is low, flat, and densely wooded. A village is on the S side of the island and there are some coconut palms. Mbuchonsaul Islet, a sand cay with a few trees on it, is close to the E end of the reef.

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Challenger Shoal, 1.25 miles E of the same islet, has a least

depth of 6.4m at its W end and 5.5m at its E end. Two shoals, with depths of 6.4m and 8.7m, respectively, are about 4 miles E of the islet.

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Reefs and dangers lie up to 1 mile off the S shore of Nares Harbor.

Noru Island and Okoru Island (Krese Island), low, flat, and densely wooded, are on an extensive reef; both are planted with coconuts.

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Anchorage.—Anchorage can be taken about 0.8 mile S of

Sori Island, in about 33 to 37m. This position is SW of and clear of a 5m shoal.

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There is also apparently good anchorage in the area between

Harengen Island and the reef surrounding Okoru Island and Noru Island, taking care to avoid the 9.1 to 12m shoal patches. Directions.—Vessels approaching from the W should run

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parallel to and about 1 mile off the N scale of Marengan Reef until Mbuchonsaul Islet bears 226°; then alter course to 177° with Failure Rocks (1°58'S., 146°42'E.) ahead. This course

Pub. 126

leads mid-channel between Challenger Shoal and Havergal Shoal, about 0.8 mile West. When Ahet Island is open S of Sori Island, bearing 295°, the vessel will be S of Havergal Shoal. Then alter course W, steering for Browne Island until the W point of Sori Island bears 005°. Course should then be altered to about 004°, taking anchorage as convenient.

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Vessels approaching from the N or E should steer for Sori

Island and head for Mbuchonsaul Islet when it can be iden- tified. Care should be taken that Mbuchonsaul Islet does not bear more than 230°, until Failure Rocks bears 177°; then fol- low the directions as above.

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Caution.—Danger areas, each 183m in diameter, are situ-

ated the following distances and bearings from the charted position of a beacon, which has been reported as missing, 0.5 mile N of the E end of Noru Island, as follows: a. 1.35 miles bearing 326°. b. 0.95 mile bearing 328°. c. 0.70 mile bearing 318.5°. d. 0.25 mile bearing 340°. e. 1.66 miles bearing 124.5°. f. 2.55 miles bearing 110°.

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Navigational aids in this area are not reliable. 9.74 Between Aripau Point (1°59'S., 146°44'E.) and

Aheyos Point, the N extremity of Manus Island, about 7.8 miles ENE, the coast is first broken by headlands and bays; and then is unbroken. Malwes Island is about 3 miles WSW of the Aheyos Point; Sapa Lousa Island is 2 miles farther in the same direction. Both islands are surrounded by reefs.

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Between Aheyos Point and the W entrance point of Balscot

Bay, about 6.5 miles E, the coast is fairly regular and is fronted by a barrier reef. Numerous coral heads are between the barrier reef and the coast.

Balscot Bay, although small and reef-fringed, is deep and is reported to afford good anchorage for small vessels with local knowledge.

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Between the E entrance point of Balscot Bay and the W

entrance point of Drugal Bay, there are a number of prominent points and coves fringed by a wide coastal reef, with several off-lying shoals. A 3.2m shoal patch is charted near the head of the bay.

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The coastal coral fringe continues as far as the W entrance of

Bowat Bay, and is wide and without break. The bay is reported to be lined with mangroves, fringed with reefs, and very shoal. Bowat village and mission station are on the E side of the bay. Anchorage.—Ponam Island is about 2 miles within the W

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end of the large barrier reef which fronts the N extremity of the island. Anchorage may be obtained by vessels, with local knowledge, between the large barrier reef and Manus Island, in depths of 21.9 to 31.1m, but the holding ground is not good and the anchorage is open to W winds. The channel W of the NW extremity of the barrier reef leading to the anchorage area has been swept to a depth of 12.2m. The anchorage area has been swept to depths of 9.1 to 12.2m. There are two 0.5 mile anchorage berths wire-dragged to 12m; three other berths have been wire-dragged to depths of 9.1 to 12.2m.

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Caution.—Caution should be used when navigating outside

the wire-dragged area because undetected coral heads may exist as well as those indicated on the chart; because the water is muddy, these dangers are hard to identify. Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210  |  Page 211  |  Page 212  |  Page 213  |  Page 214  |  Page 215  |  Page 216  |  Page 217  |  Page 218  |  Page 219  |  Page 220  |  Page 221  |  Page 222  |  Page 223  |  Page 224  |  Page 225  |  Page 226  |  Page 227  |  Page 228  |  Page 229  |  Page 230  |  Page 231  |  Page 232  |  Page 233  |  Page 234  |  Page 235  |  Page 236  |  Page 237  |  Page 238  |  Page 239  |  Page 240  |  Page 241  |  Page 242  |  Page 243  |  Page 244  |  Page 245  |  Page 246  |  Page 247  |  Page 248  |  Page 249  |  Page 250  |  Page 251  |  Page 252  |  Page 253  |  Page 254  |  Page 255  |  Page 256  |  Page 257  |  Page 258  |  Page 259  |  Page 260  |  Page 261  |  Page 262  |  Page 263  |  Page 264  |  Page 265  |  Page 266  |  Page 267  |  Page 268  |  Page 269  |  Page 270  |  Page 271  |  Page 272  |  Page 273  |  Page 274  |  Page 275  |  Page 276  |  Page 277  |  Page 278  |  Page 279  |  Page 280  |  Page 281  |  Page 282  |  Page 283  |  Page 284  |  Page 285  |  Page 286  |  Page 287  |  Page 288  |  Page 289  |  Page 290  |  Page 291  |  Page 292  |  Page 293  |  Page 294  |  Page 295  |  Page 296  |  Page 297  |  Page 298  |  Page 299  |  Page 300  |  Page 301  |  Page 302  |  Page 303  |  Page 304  |  Page 305  |  Page 306  |  Page 307  |  Page 308  |  Page 309  |  Page 310
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