Holland I
Encyclopedia
Holland I was a prototype submarine designed by John Philip Holland
John Philip Holland
John Philip Holland was an Irish engineer who developed the first submarine to be formally commissioned by the U.S...

, followed by Holland II
Holland II
Holland II was a prototype submarine designed by John Philip Holland, preceded by Holland I and followed by Holland III.It should not be confused with Holland 2, the second Holland class submarine of the Royal Navy....

and Holland III
Holland III
The Holland III was an early prototype submarine made by John Holland. The 16-foot 1-ton model was a scaled-down version of the Fenian Ram intended for experiments to help him improve navigation....

.

It should not be confused with Holland 1
Holland 1
Holland 1 was the first submarine commissioned by the Royal Navy, the first in a six-boat batch of the Holland-class submarine. She was lost in 1913 while under tow to the scrapyard following decommissioning...

, the first ever Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...

.
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