Its highest point is at 139 m.[2] Its western coast is facing Double Haven.
It is one of the 26 designated marine fish culture zones in Hong Kong.
[3] Double Island became part of the Plover Cove (Extension) Country Park in 1979.
[4] It is wrongly suggested that it was the Double Island in Hong Kong's Double Haven (Yan Chau Tong, 印洲塘) where the September Typhoon of 1858 destroyed several well-known opium clippers, including the Anonyma, Gazelle, Pantaloon, and Mazeppa.
Basil Lubbock's The Opium Clippers, cited in the original entry, is quite clear (p.347) that the Double Island in question was that at what was then called Swatow (today Shantou).