HNLMS O 19
SUBMARINE OF THE ROYAL NETHERLANDS NAVY
HNLMS O-19; HNLMS K XIX
O 19, laid down as K XIX, was an of the Royal Netherlands Navy that saw service during World War II. O 19, along with her sister ship , were the first submarines in the world to be equipped with a submarine snorkel that allowed the submarine to run its diesel engines while submerged.