If you look into it more, you'll see that Tonijin was originally considered a Potvis class sub, probably because the Potvis and Tonijin were built at the same yard. Over time, the four near sisters (the other was Zeehond which followed Dolfijn and was built at the same yard as Dolfijn) became so similar, that all four were considered the same class.
By the way, Potvis is a Sperm Whale, Tonijin is a tuna, Zeehond is a seal, and Dolfijn likely needs no explanation.
The Dutch are, by my experience, very competent mariners. It will be interesting to see where their sub force is headed. Like most maritime nations, they like to build their own kit. But shipyards are closing all over Europe and I'm not sure the Dutch have a yard that's still in business that's ever built a sub. Their current Dutch subs are much evolved versions of the last US open ocean diesels (the Barbels). These will wear out eventually. Will be interesting to see what the Dutch decide to do...
By the way, Potvis is a Sperm Whale, Tonijin is a tuna, Zeehond is a seal, and Dolfijn likely needs no explanation.
The Dutch are, by my experience, very competent mariners. It will be interesting to see where their sub force is headed. Like most maritime nations, they like to build their own kit. But shipyards are closing all over Europe and I'm not sure the Dutch have a yard that's still in business that's ever built a sub. Their current Dutch subs are much evolved versions of the last US open ocean diesels (the Barbels). These will wear out eventually. Will be interesting to see what the Dutch decide to do...
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