Ailinginae Atoll (Marshallese: Aelōn̄in Ae, [ɑ̯ɑ͡æe̯elʲe͡ɤŋɯ͡inʲ-ɑ̯ɑ͡æɛ̯ɛɛ̯]) is an uninhabited (due to Castle Bravo nuclear testing) coral atoll of 25 islands in the Pacific Ocean, on the northern end of the Ralik Chain of the Marshall Islands. Its total land area is only 2.8 square kilometres (1.1 sq mi), but it encloses a lagoon of 105.96 square kilometres (40.91 sq mi). It is located approximately 13 kilometres (8.1 mi) west of Rongelap Atoll. The landscape is low-lying with only the top 3 metres above sea level. The two entrances into the lagoon are 'Mogiri Pass' and 'Eniibukku Pass'.