The DEMO video is here:
https://v.qq.com/x/page/o0961dt4bp2.html

It has proved that it is the most important link in the entire Soviet amphibious defense combat system. Together with the bullfrog, it constituted an almost unbreakable coastal combat line in the early Soviet Union.

When an enemy gunship or submarine attempts to bomb or seize control of the sea near the shore, Spenny itself can repeatedly land and dive as an amphibious submarine.
As a result, the other party is repeatedly entangled in the question of whether it should be antisubmarine or bombing on the other side.
Although driving this type of submarine ashore, this is a more professional problem in itself, because the powerful centrifugal force of the tail propeller will cause ghosts to occur to a certain extent when landing (the need to control the speed of outflow and inflow to about 10mph).
However, Spenny can still rely on a special anti-submarine torpedo that can be launched in an amphibious state to carry out a fatal blow to the enemy ship with an extremely high exchange ratio.

Operatings:
AG1 Anti-submarine torpedo preparation or launch (corresponding to camera 1, FireWeapons part-time torpedo slows down)
AG5 Detonated No. 1 anti-submarine torpedo (regardless of state)
AG2 No. 2 anti-submarine torpedo preparation or launch (corresponding to No. 2 camera, FireWeapons part-time torpedo slows down)
AG6 Detonated No. 2 anti-submarine torpedo (regardless of state)
AG3 Anti-submarine torpedo preparation or launch (corresponding to camera 3, FireWeapons part-time torpedo slows down)
AG7 Detonated No. 3 anti-submarine torpedo (regardless of state)

AG4 Parking brake hydraulic pile (Thorrtle control)
AG8 Submarine Dive Depression Control (Thorrtle Control)

LandingGear - Engine wheel left/right rolling
VTOL - Engine wheel forward/backward
Trim - Sub/Vehcials yaw control