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276

Sector 10. Micronesia, Palau, and Guam

10.17 Nema Island (Nama Island) (7°00'N., 152°35'E.) is

nearly 1 mile long in a NW-SE direction and nearly 0.5 mile wide. It is somewhat higher than most islands in this general area and resembles a fort when viewed from the offing. It is covered with palm, pandanus, and breadfruit trees. A village stands on the W side of the island.

10.17

The island is reef-fringed and shoal ground, as defined by the

10m curve, extends 0.5 mile off the N and SE sides. A weak E current has been experienced about 10 miles N of Nema Island.

Kuop Atoll (7°02'N., 151°56'E.) consists of four coral islets standing on the atoll reef enclosing a lagoon.

10.17 10.17

The lagoon is deep, except for a few scattered coral heads. A

deep, but narrow small-craft passage leads across the SE side of the atoll reef. Anchorage can be taken by small craft, in 18.3 to 46m, in the lagoon.

10.17

Strong currents are reported in the channel that separates the

N end of the atoll from the E part of the S side of the atoll reef that encloses the Truk Islands.

The Chuuk Islands (Truk Islands)

10.18 The Chuuk Islands (Truk Islands) (7°25'N.,

151°50'E.) comprise the largest island group in the Caroline Islands. The group consists of nearly 98 islands and islets, 41 of which are on a great encircling reef ranging in diameter from 30 to 40 miles. There are 11 main islands up to 10 square miles in area. They are mountainous and of volcanic origin, and lie within the encircling barrier reef. The latter is broken by about five principal and numerous lesser passes. Most of the barrier reef is awash at LW. The islets on it are of coral sand, with dense growths of coconut palms. Few exceed 30m high to the tops of the trees.

10.18

The large islands within the lagoon are mostly formed of

basalt, are wooded, and have some prominent peaks. The low land near the coasts consist mainly of forests of coconut palms and mangrove swamps. Sandy beaches are rare, but a few exist on Moen (Weno).

The smaller islands within the lagoon have sandy beaches and low sandy interiors covered with palm trees.

10.18

The principal settlement and commercial port is situated on the NW side of Moen (Weno).

10.18 10.18

Tides—Currents.—The range of tides in the lagoon is usu-

ally small. The average tidal range is 0.4m at Dublon Island and 0.5m at Moen (Weno). The tropic range, which is the in- creased diurnal range occurring semi-monthly, is 0.6m at Dub- lon Island and 0.6m at Moen (Weno). The maximum tide is about 0.9m. Tides usually occur twice daily within the same 2- hour period, except when the diurnal inequality is greatest and there is one tide.

10.18

The tidal currents in the passages turn approximately at HW

and LW, with the flood current flowing into the lagoon and the ebb out of it.

10.18

It was reported that the currents in Northeast Pass run at a

much stronger velocity than shown on the chart. In the vicinity of the pass, the tidal currents are affected by the wind, and a maximum velocity of 5 knots has been obtained. A heavy swell occurs at spring tides with strong NE winds.

Within the lagoon, the currents are complicated and seldom exceed 0.5 knot.

10.18

Pub. 126

10.18

Photo by Bernard Cloutier, http://berclo.net/inden.html

Moen (Weno)

Depths—Limitations.—The barrier reef is broken by nu-

merous passages, many of which have been swept to adequate depths. Extensive areas within the lagoon have been swept to depths indicated on the chart. Almost the entire N part of the lagoon has been swept to depths of 16.8m, except for the shoals, which have been swept to lesser depths. Swept areas and channels lead from the main passes to the anchorages off the main islands.

10.18

Numerous above and below-water dangers are scattered

throughout the lagoon. The islands are fringed by reefs and fronted by dangers.

10.18

Northeast Pass (7°30'N., 151°59'E.), the recommended

pass, is marked by breakers and by the white cylindrical light to the S and Mor Island to the N. The charts indicate several swept passages that lead from the various passages to the an- chorage areas. Vessels should stay within these areas and navi- gate through them under only the most favorable conditions of light, due to the numerous scattered reefs and shoals. The chan-

Photo by Bernard Cloutier, http://berclo.net/inden.html

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