Ocean Island Railway
The Ocean Island Railway was a -long phosphate mining railway on Ocean Island. It had an initial gauge of. After 1937, the gauge was widened to and, finally, to .
Route
The track ran along the coast from the northern guano mining areas, through the European Settlement and the Native Labour Quarters to the depot and Boat Harbour.Operation
Initially, steam locomotives manufactured by Orenstein & Koppel, and a saddle tank locomotive manufactured by Bagnall, were used. One O&K locomotive was named Florence, one had the number 7 and another one the number 11.Later, diesel locomotives were used. European passengers were transported in a canopy car and native labourers in an open wagon.
Locomotives
| Manufacturer | Type | Works No | Year | Gauge | Remarks |
| Bagnall | 610 mm | Saddle tank locomotive | |||
| O&K | 9880 | 1922 | 610mm | No 11 | |
| O&K | 11174 | 1926 | 610mm | Location unknown, possibly on another island | |
| O&K | 11291 | 1926 | 610mm | Location unknown, possibly on another island | |
| O&K | 11585 | 1928 | 610mm | ||
| O&K | 11586 | 1928 | 610mm | ||
| O&K | 12678 | 1935 | 610mm | No 7 | |
| O&K | 12887 | 1937 | 914mm | ||
| O&K | 12888 | 1937 | 914mm | ||
| O&K | B-t | 12889 | 1937 | 914mm | |
| O&K | 12890 | 1937 | 914mm | ||
| O&K | 12891 | 1937 | 914mm | ||
| O&K | 3300 | 1909 | 600mm | 40 PS, delivered to Marrison, James & Co., Australia for Nauru, from 1920 as No 12 on Ocean Island |