Yet one more submersible boat. It seems these are all the rage now.
IRGC = Iran's Islamic Revolution Guards Corps (IRGC).
"IRGC showcases torpedo-armed submersible watercraft"
"The IRGC also displayed a semi-submersible torpedo boat called the Zolfaqar. Such vessels are not considered to be true submarines because they need to keep a snorkel above the water to feed oxygen to their engines . . . Iran's Islamic Revolution Guards Corps (IRGC) Navy has unveiled a torpedo-armed watercraft which is capable of operating both on and under water."
"The domestically-manufactured submersible watercraft, dubbed Zolfaqar, was showcased for the first time at a public exhibition on Saturday, Fars news agency reports."
"The 17-meter-long military equipment weighs about 22 tonnes and has a speed of 40 knots (more than 70 kilometers) per hour on the sea surface."
This image shows the rear of the boat. Dual propellers and dual rudder. Like on a submarine of the World War Two era. A semi-submersible boat that is "wet" inside and cannot fully submerge, not having an electric motor powered by battery for propulsion.
Zolfaqar also having an organic torpedo capacity. Carries two torpedoes with some significant capability.
Again, are "not considered to be true submarines" but having an effectiveness nonetheless.