There were five midget Japanese submarines : I-16, I-18, I-20, I-22, and I-24 .
During World War 2, it is reported that over 2,000 variants of Japanese Submarines were used during World War 2. Out of this, it is estimated that 10,000s were likely to be used during WW2.
2,200,000 Soldiers 97 Warships 40 Submarines.
Shallow diving submarines are used for reef watching in many parts of the world.
About 435. Any consensus?
Approximately 28 (23 fleet subs, 5 midget subs). Note that 80% of the midget submarines were destroyed, while the fleet submarines suffered no losses.
Yes, many submarines were used in WW1 by most of the major combatants.
The British lost 76 submarines during WWII.
1, 200,000 Soldiers 30 Warships 11 Submarines.
52 US submarines were lost in WW2. This was about 1 in every 5 submarines that the US had in WW2
There are different answers to that but the most common one is that the USN had 288 submarines in WW2
Many early submarines were failures. However, as many countries in the world now own and even build submarines, we could reasonably call them a success.
USN about 250.
Submarines are made in many places all over the world
About 2,100 by many different countries.