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Kurru

Turn on both 1st and 2nd generators for faster speed on sea surface, extend control fins for more stability, extend air intake for keeping 1st generator on while in bad weather

2nd generator work underwater as long as there is air (air refill itself while the ship on surface and secondary generator button is on)

Fill up the secondary tank (either with fuel / use the button to fill water) and open the cabin door on the top part to go submerge (or disconnect the top part), fill the hatch room with water to exit the submarine while submerge so no extra water is coming into the submarine

set the clutch to around 0.25, extend the tracks and use arrow key to drive

all 4 pilot seats work, but only use the lower 2 seats when submerge, the top right seat control the water cannon while the other 3 control the tracks

Still Work in progress so things may change