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252

Sector 9. The Bismarck Archipelago

reported dangers. The latter point has a number of grassy fields in its vicinity; the remainder of the coast is wooded. Mount Tangi, 1,548m high, and Mount Talawe, 1,827m high, back this coast and serve as prominent landmarks.

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The N part of this coast, between Lagunen Point and Dorf

Point, is cliffy and from 15 to 30m high. A lagoon lies beyond the former point, within the fringing reef. There are several vil- lages along this coast. Cape Glouchester, the NW extremity of New Britain, will be described later in paragraph 9.53. Ritter Island (5°31'S., 148°07'E.), 137m high and steep, is about 12 miles WNW of Lagunen Point.

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Caution.—Ritter Island has had an active volcanic career. A submarine volcano, which last erupted in 1974, lies close S of the island. The area should be given a wide berth.

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Sakar Island, partly wooded and formed by a volcano, is

998m high. The mountain slopes gently to the sea in all direc- tions.

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Umboi Island, volcanic and mountainous, is 1,585m high; it

is densely wooded, except for some cultivated parts. The ex- treme S part of the island is quite low. On the N and W sides, high land descends steeply to the sea.

9.46 Tolokiwa Island (5°19'S., 147°37'E.), 12 miles NW

of the NW extremity of Umboi Island, is a volcanic cone, 1,396m high; it is wooded and inhabited. The island is fringed by a reef extending 0.5 to 1 mile offshore. An islet about 1 mile W of the NW side of the island forms a harbor for small craft. The Siassi Islands are on an area of extensive reefs S of Um-

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boi Island. The E part of this area impinges on the swept chan- nel portion of Dampier Strait. The area has not been com- pletely surveyed.

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Marien Harbor, on the S end of Umboi Island, is a small pro-

tected inlet approachable only by small craft with local know- ledge.

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Between Graah Point (5°49'S., 148°02'E.) and Cape

Umboi (5°38'S., 148°06'E.), the coast is fringed by a narrow reef and fronted by dangers. This entire coastal water area has not been examined.

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The W coast of Umboi Island, between the S end of the is-

land and Higgins Point, is fringed by reefs and fronted by dan- gers. Between Higgins Point and Cape King, the coast is fairly regular. A fringing reef borders the coast for a distance of 7.5 miles S of Cape King. Rocks are found 0.75 mile offshore, about 6.5 miles S of Cape King. Cape King is rocky; spurs from the high land within extend down to the coast; the cape is fringed with a reef that dries in patches to almost 0.2 mile offshore.

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A 7.3m shoal lies 7.75 miles W of Higgins Point; O’Brien

Shoal, unsurveyed and with a depth of 3.7m, is about 6.8 miles NNW of it. A 9.1m shoal lies about 5.5 miles N of O’Brien Shoal.

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Hein Islet, 29m high and wooded, is about 3 miles NNW of

Cape King; charted shoals are E and SW of it. The area be- tween Hein Islet and Sakar Island has not been surveyed. Luther Anchorage, open to the NNW, is between Cape King

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and a reef extending from Rawlings Point. Anchorage should be attempted only with local knowledge and favorable light. Approach Cape King on a bearing of about 095° until Hein Islet is astern bearing 333°, then bring that islet astern on that

Pub. 126

bearing and steer for the anchorage. Vessels can anchor, in 24m, with Rawlings Point bearing 227° and Hein Islet bearing 332°.

New Britain—North Coast

9.47 The N coast of New Britain, between Cape Glouc-

ester and the NW point of the Gazelle Peninsula, is formed by stretches of mud, rock, and sand. These stretches are inter- rupted by cliffs and steep slopes that generally are the seaward sides of hills and mountains and the terminals of mountain ridges. Low, undulating, and hilly terrain backs the sandy stretches. Muddy shores are as a rule bordered by mangroves and swamps.

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A belt of active volcanoes is found along the N coast. The

low relief of this coast is broken by a large number of volcanic peaks, which attain a maximum height of about 2,286m in its NE part. A large number of eruptions have occurred in recent times. Geysers and hot springs are numerous. The Willaumez Peninsula has many volcanoes with lofty cones. The cluster of volcanoes at the W end of the island is separated from those in the range to the E by a broad isthmus of undulating terrain. The W and N coasts of the Gazelle Peninsula have stretches

9.47

of mud, rock, and sand that alternate with cliffs and steep slopes. Low, hilly, and undulating terrain backs the coast. The interior of the peninsula is hilly and mountainous.

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Mountains begin to appear as Borgen Bay is approached.

The low-lying shores, covered with black sand, extend a short distance back to a belt of trees, and gradually slope off into mountains 1,829m high.

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The Willaumez Peninsula, projecting 30 miles NNE from the

coast, is mountainous and has a large crater lake at its NE end. The W coast of the peninsula is heavily wooded and has several prominent peaks. Mount Bangum, 991m high, is about 2.5 miles E of Cape Schellong. Mount Bulu, 1,164m high, is located about 2.5 miles E of Cape Goltz. Mount Lotomgan, a distinctive summit, 593m high, is about 5 miles SSE of Mount Bulu. The Willaumez Peninsula is a good radar target from 25 miles. Mount du Faure, 752m high, backs the SW coast of Stettin

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Bay. Mount Welcker, 1,105m high, is the N and highest of a group of mountains extending from 5 to 13 miles NNW of Mount du Faure.

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Cape Hoskins (5°26'S., 150°32'E.) is bold, cliffy, and

backed by high mountains. Mount Matalelock, 1,056m high, and Mount Mululus, 1,313m high, are located 10 miles WSW and SW, respectively, of the cape. Mount Pyramid, 272m high, is 12 miles SE of the cape. A range of high mountains, running N and S, extends a short distance inland of a line joining the cape with Mount Pyramid. Mount Lolla, 819m high, is near the N end of this ridge.

9.48 Lolobau Island (4°55'S., 151°10'E.), W of Cape Tor-

koro, is prominent from the offing. Its summit is an active vol- cano, 932m high, with a prominent split. The volcano, as a rule, does not emit much smoke, except after a heavy rain. A conical peak, 580m high, lies near the E end of the island which terminates in a red cliff. Lolobau is about 0.4 mile ESE of its charted position.

Cape Torkoro is steep-to with high cliffs. Mount Galloseulo, 1,173m high and prominent, is located about 25.5 miles SW of

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