Before 1904, the Reich built 12 experimental pocket submarines:

Year 1900

The No. 1 model (No. 1-4) was a gasoline engine, and was presented to Japan in 1906 as the No. 3 test.

Displacement: 43 tons above water / 50 tons under water

Speed: 7 knots above water / 2 knots underwater

Range: 80 knots above water, 4 knots/10 knots underwater

TORPEDO: 1 PC. 450MM TORPEDO

TORPEDO TUBE: 1 450MM TORPEDO TUBE

Safe working depth: 30 meters

Crew: 4 -

1902 year

Special Test No. 5 boat type (Special Test No. 5-10, of which No. 8 and No. 10 were sunk and scrapped during the experiment, and Special Test No. 9 was given to North Korea in 1909)

Displacement: 70 tons above water / 81 tons under water

Speed: 8.5 knots above water / 4 knots underwater

Range: 120 nautical miles/8 knots overwater, 4 knots/15 knots underwater

TORPEDO: 1 PC. 450MM TORPEDO

TORPEDO TUBE: 1 450MM TORPEDO TUBE

Safe working depth: 30 meters

Crew: 6 -

1904 year

Special Test No. 11 Boat Type (Special Test No. 11 and No. 12)

Displacement: 96 tons above water / 114 tons under water

Speed: 9 knots above water / 6 knots underwater

Range: 180 nautical miles/9 knots overwater, 6 knots/20 nautical miles underwater

TORPEDOES: 2 450MM TORPEDOES

TORPEDO TUBE: 1 450MM TORPEDO TUBE

Safe working depth: 40 meters

Crew: 8 -

In 1905, the first submarine unit was formed by five special test pocket submarines, numbered as the 1st Diving Squadron, which was subordinate to the 6th Fleet of the Zhenyang Fleet, marking the initial formation of combat effectiveness of the submarine force of the Imperial Navy.

From 1905 to 1907, with the implementation of the three-year construction plan of the Navy in 04, 8 more practical small inshore submarines were included in the equipment sequence:

1905 year

2 Sea Dragons: Sea Dragons and Sea Tigers

Displacement: 250 tons above water / 276 tons under water

Speed: 12 knots above water / 8 knots underwater

Range: 500 nautical miles/12 knots overwater, 6 knots/50 nautical miles underwater

TORPEDOES: 2 450MM TORPEDOES

TORPEDO TUBES: 2 450MM TORPEDO TUBES

Safe working depth: 40 meters

Crew: 18 -

1906-1907

6 seals: seals, sea wolves, sea lions, sea seals, manatees, and dolphins

Displacement: 300 tons above water / 337 tons under water

Speed: 12 knots above water / 8 knots underwater

Range: 650 knots/12 knots overwater, 6 knots/70 knots underwater

TORPEDOES: 450MM TORPEDOES 5 PIECES

TORPEDO TUBES: 3 450MM TORPEDO TUBES

Safe working depth: 40 meters

Crew: 22 -

In 1907, on the basis of the above eight Haizi submarines, the No. 1 Diving Squadron was reorganized, and the original five special test pocket submarines of the squadron were transferred to the Diving Force Training Center in Qingdao.

1908 year

Six Shark 1 ships (Shark 1-6) were built, and 2 were sold to Japan and North Korea, and 2 more were copied by Japan.

Displacement: 330 tons above water / 369 tons under water

Speed: 16 knots above water / 10 knots underwater

Range: 850 nautical miles/12 knots overwater, 4 knots/70 nautical miles underwater

Torpedoes: 3 500 mm torpedoes

Torpedo tubes: 3 500mm torpedo tubes (2 in front and 1 in rear)

Safe working depth: 45 meters

Crew: 25 -

1909 year

Construction of 6 Whale 1 (Whale 1-6), the first large ocean-going submarine, from then on began to use diesel engines on submarines.

Displacement: 556 tons above water / 780 tons under water

Speed: 16 knots above water / 10 knots underwater

Range: 5,500 nautical miles/8 knots overwater, 4 knots/70 nautical miles underwater.

Torpedoes: 8 500-mm torpedoes

Torpedo tubes: 5 500 mm torpedo tubes (4 in front and 1 in rear)

Artillery: 1 120 mm/45 x single gun, 1 60 mm/50 x anti-aircraft gun.

Safe working depth: 45 meters

Crew: 36 -

1910 year

Construction of 4 Whale-1 mine-laying submarines (Whale 7-10) and ocean--pelagic minelaying submarines.

Displacement: 550 tons above water / 774 tons under water

Speed: 12 knots above water / 8 knots underwater

Range: 9,000 nautical miles/8 knots overwater, 4 knots/50 nautical miles underwater

Torpedoes: 5 500 mm torpedoes

Torpedo tubes: 3 500mm torpedo tubes (2 in front and 1 in rear)

Mines: 16 mines

Artillery: 1 90 mm/50 x single gun, 1 60 mm/50 x anti-aircraft gun

Safe working depth: 45 meters

Passengers: 35 -

Construction of 4 Shark II (Shark 7-10), small inshore submarines.

Displacement: 380 tons above water / 435 tons under water

Speed: 16 knots above water / 10 knots underwater

Range: 2500 nautical miles/8 knots overwater, 4 knots/70 nautical miles underwater

Torpedoes: 5 500 mm torpedoes

Torpedo tubes: 3 500mm torpedo tubes (2 in front and 1 in rear)

Artillery: 1 90 mm/50 x single gun, 1 60 mm/50 x anti-aircraft gun

Safe working depth: 50 meters

Passengers: 30 -

P.S. 1 -

Typical and blueprint of practical submarines before and after the Russo-Japanese War in history, American "Holland" type data:

Engine; gasoline engine

Displacement; 103 tons above water / 124 tons under water

Speed; 8 knots above water / 7 knots underwater

Voyage; 264 nautical miles above water/6 knots / 20 nautical miles under 8 waters

Torpedo; 2 PC. 450MM TORPEDOES

torpedo tubes; 1 450MM TORPEDO TUBE

safe working depth; 46 meters

In 1900, Britain purchased five boats of this type to form the first submarine force of the Royal Navy.

After the outbreak of the Russo-Japanese War, both Japan and Russia purchased submarines of this type, but neither of them was able to participate in actual combat.

Appendix 2 -

Royal Navy C1 class submarine (first commissioned in 1905) Facts:

Displacement; 286 tons above water / 321 tons underwater

Speed; 12 knots above water / 8.5 knots underwater

Voyage; 660 nautical miles above water/4 knots / 60 nautical miles below 12 waters

Torpedo; 2 PC. 450MM TORPEDOES

torpedo tubes; 2 450MM TORPEDO TUBES

safe working depth; 30.5 meters

P.S. 3 -

Information on the S-class submarines of the French Navy (in service before World War I):

Displacement; 529 tons above water / 737 tons under water

Speed; 16.5 knots above water / 10 knots underwater

Voyage; 2050 nautical miles above water/10 water, 4 knots/60 nautical miles under water

Torpedo; 450MM TORPEDOES 8 PCS

torpedo tubes; 6 450MM TORPEDO TUBES (2 BOW + 4 DECK)

Artillery; 50MM 1 ANTI-AIRCRAFT GUN

safe working depth; 40 meters

Appendix 4 -

Information on the U-46 submarine of the German Navy (commissioned in the early part of World War I):

Displacement; 786 tons above water / 940 tons under water

Speed; 17.1 knots above water / 9.7 knots underwater

Voyage; 9,000 nautical miles above water/8 knots / 55 nautical miles under 8 waters

Torpedo; 533MM TORPEDOES 8 PCS

torpedo tubes; 4 533MM TORPEDO TUBES (2 FRONT + 2 REAR)

Artillery; 1 105MM single-mounted gun + 1 88MM anti-aircraft gun

safe working depth; 50 meters