Officers quarters of Hai Lung or Hai Hu, date unknown. Photo is made during the official transfer, from builders to Taiwan of the boat. (Photo: © Collection Ben Dijkstra).

Command room of Hai Lung or Hai Hu, date unknown. Photo is made during the official transfer, from builders to Taiwan of the boat. (Photo: © Collection Ben Dijkstra).

Hai Lung being laid down, Dec 1982 Schiedam.(Photo: © Collection Ben Dijkstra).

Hai Lung and Hai Hu being laid down, Dec 1982 Schiedam.(Photo: © Collection Ben Dijkstra).

Hai Lung being laid down, Dec 1982 Schiedam.(Photo: © Collection Ben Dijkstra).

Picture postcard of Sea Dragon during trials, Netherlands. (Postcard: © Collection Ben Dijkstra).

The attack scope of one of the Sea Dragon class boats. Boat and date unknown. (Photo: © Ben Dijkstra).

X station of one of the Sea Dragon class boats. Boat and date unknown. (Photo: © Ben Dijkstra).

Rear diesel generator of Sea Dragon. Date unknown. (Photo: © Ben Dijkstra).

Port diesel generator of Sea Dragon. Date unknown. (Photo: © Ben Dijkstra).

Two of the six torpedo tubes of one of the Sea Dragon class boats. Boat and date unknown. (Photo: © Ben Dijkstra).

Upper engine room of one of Sea Dragon. Date unknown. (Photo: © Ben Dijkstra).

The galley of one of the Sea Dragon class boats. Boat and date unknown. (Photo: © Ben Dijkstra).

A yard worker is polishing the propeller of one of the Sea Dragon class boats. Boat and date unknown. (Photo: © Ben Dijkstra).

Engine room control station of Sea Dragon. Date unknown. (Photo: © Ben Dijkstra).

The stern of one of the Sea Dragon class boats. Boat and date unknown. (Photo: © Ben Dijkstra).

Torpedo room of Sea Dragon. Date unknown. (Photo: © Ben Dijkstra).

Depth gauge of Sea Dragon. They went to 222 meoters. Date unknown. (Photo: © Ben Dijkstra).

The two Chien Lung / Hai Lung class submarines under construction. Date unknown. (Photo: © Wilton Fijenoord)

The two Chien Lung / Hai Lung class submarines under construction. Date unknown. (Photo: © Ben Dijkstra)