Pulau Muci (Mubi), 81m high, lies 1 mile S of Pulau Alangtiga. These islands may be passed at a prudent distance on their W side.
A light, from which a racon transmits, is shown from Pulau Muci.
A small coral reef, with a least depth of 4m, lies 6.5 miles NE of Pulau Muci. Shoals, with depths of 5 and 10.1m lie, respectively, 1 mile ENE and 6.5 miles NNW of Pulau Muci.
http://www.chinci.com/travel/pax/q/1651656/Pulau+Alangtiga/ID/Indonesia/0/#0|0|travel|ho|0|1651656|Pulau Alangtiga|ID|Indonesia|Asia/Pontianak|00|ISL|-0.5166667|104.0333333|Indonesia (general)
and it says:
Pulau Alangtiga is a island in the country of Indonesia with an average elevation of 3 feet above sea level. The location is sparsely populated with 0 people per mile2
Which is correct?
Also you have a photo of the island?