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Sector 10. Micronesia, Palau, and Guam

10.14

Etal Atoll (5°35'N., 153°34'E.) consists of several low, flat

islets which are covered with coconut palms and breadfruit trees. Etal is the largest and principal island. The entrance of the lagoon is located about 45m NNW of the SW tip of Etal. The pass is bordered on either side by coral rock, fish weirs, and is both shallow and narrow.

10.14

Namoluk Atoll (5°55'N., 153°08'E.) consists of five coral

islets on an atoll reef. Namoluk, 30m high and having a church on it, is the highest and NW islet of the group. A church stands on Amas, located on the SE side of the atoll. A jetty is situated at the S end of Namoluk. There is a radio station on Namoluk.

Depths of 20 to 77m are found within the lagoon, but the passage on the SW side of the atoll is suitable only for boats under the most favorable conditions. Another boat passage was reported close SE of Namoluk, but was subject to heavy tidal surge conditions.

10.14

10.15 Oroluk Lagoon (7°30'N., 155°15'E.) is formed by a

chain of reefs which mostly dries and has an average width of 0.5 mile. Oroluk, a densely wooded and prominent island, lies on the NW side of the lagoon. A conspicuous wreck lies close NE of Oroluk. A second wreck is reported to lie about 2 miles further SE.

10.15

Depths—Limitations.—The seaward side of Oroluk La-

goon is steep-to, with no apparent off-lying dangers. Mariners should give the reefs surrounding the lagoon a wide berth. Many above and below-water dangers are found within the lagoon.

10.15

Pioneer Pass, located on the W side of the lagoon, is narrow

and suitable only for small craft. Reefs and shoals encumber both sides of the entrance and a shoal reef lies close inside. West Pass, 2.75 miles S of Pioneer Pass, is about 0.3 mile

10.15

wide, with a shoal swept to a depth of 7.3m in the entrance. Tidal current in the pass attain a rate of 1 knot.

10.15

Another unnamed pass, 0.3 mile wide, lies 1.25 miles SE of

West Pass. A coral patch, with depth of 0.9m, lies on the N side close within the entrance. A channel swept to a depth of 12.8m passes to the S of this patch.

10.15

Tides—Currents.—Currents in the vicinity of Oroluk La-

goon are strong and irregular during strong NE winds. A W current of 1 knot is experienced off Keltie Pass on the N side of the lagoon.

Anchorage.—Oroluk Lagoon is reported to afford unlimited anchorages, but offers no protection other than that provided by the atoll reef. Vessels can anchor, in a depth of 20m, about 1 mile SSE of Oroluk.

10.15

10.16 Minto Reef (8°10'N., 154°18'E.), 59 miles NW of

Oroluk Island, is an atoll reef, about 4.5 miles long. A sand bank, about 1.8m high, stands on the N side of the reef. This reef is visible only under favorable conditions of light and con- stitutes a dangerous hazard at all other times. Several wrecks lie stranded on this reef. There are several shoal passages into the lagoon.

10.16

Losap Atoll (6°54'N., 152°42'E.) consists of about 17 islets

on the atoll reef. Laol, 25m high and located at the NE end of the atoll, is the largest island of the group. A pier and a jetty are situated at the W end of Laol. Losap island, which stands on the lagoon side of the atoll reef, just W of Laol, is 31m high.

Image courtesy of NASA

Losap Atoll

There is a sandy beach on the W side of Losap. A small church stands on this island. There is also a radio station. Alanmwas- sel Island, on the NW side of the atoll, is 7.9m high. Pis Island, 37m high and having a church on it, is the E island of the group on the S side of the atoll.

10.16

Tides—Currents.—High and LW occur at the same time as

at Truk Islands. Slack water lasts about 20 minutes and occurs roughly at the time of HW and LW. The tidal currents through the passages attain velocities of 1 to 1.5 knots.

10.16

Depths—Limitations.—Depths of 31 to 68m are found in

the lagoon. The scattered dangers in the lagoon lie close off the atoll reef and just inside the several entrances. As the atoll reefs are submerged, the entrance cannot be recognized until close- to. It was reported that none of the lagoon entrances are suit- able for large vessels.

10.16

Several passages are reported to lead into the lagoon, one on

the E side and the others on the W side. Morrappu Channel, the third passage from the S, on the SW side of the atoll, is reported to have a least depth of 4.3m and to be about 230m wide. A small, white sandy islet, 0.9m high, stands on the reef on the N side of the channel. Breakers mark each side of the channel. A vessel using Morrappu Channel reported (1968) a depth of 7.3m over the reef and a wreck stranded on the N limit of the channel. In 1978, a vessel 65m long reported using the channel without difficulty.

10.16

Morchan Channel, on the SE side of the atoll, is about 90m

wide and has a depth of 4.6m in the fairway. It is narrow, tor- tuous, and not recommended.

10.16

Anchorage.—Small vessels can anchor, in 18.3m, from 0.3

to 0.5 mile off the W side of Losap. Protection is afforded from the prevailing NE winds.

Pub. 126

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