PULAU AMSTERDAM? 1888 floating dock

I wonder if this might be a type of floating dock? The vertical cylindrical structures could be flotation chambers.

Could it be that the name of the vessel was "Amsterdam" because I don't think the location was Amsterdam.
Regards Jan

I too had my doubts about the location given. It looks a bit like Dutch East Indies (see the boat with the sun shelter). And indeed:
On December 1, 1881, the first dock of the Netherlands Indian Dry Docks Company was opened on the isle Amsterdam (=Pulau Amsterdam on the roadsteads of Batavia). The paddle steamer Hs.Ms. OENARANG under Captain Volck sailed on 19th November 1888 from Batavia to Pulau Amsterdam. It is very likely that the photo was taken on or around that date.

Moreover captain Volck was at the east coast of Sumatra in 1889 (Palembang or Musi River) aboard Hs.Ms. OENARANG (Source: archivesportaleurope.net).

Caption changed.

That island in the roads at Batavia had a long history of ship repair. Captain Cook called there for some months on his first voyage, homeward bound, for repairs to HMS Endeavour.

The current name of the island is Pulau Untung Jawa.

Steamer could be Dutch East India General Service Fleet, gunboat "Oenarang" (Disp 650t; IHP 360; launched 1875).