BMP-3F. The Russian Amphibious Combat Vehicle.

I don't know what to make of the BMP-3F.  If it works as well as its stats indicate then it blows the AAV away in every category and matches its sea keeping.  That's a big if.  Click here to check out the manufacturers website.

Advanced manoeuvrability afloat, capability to move afloat at Sea State 3 Firing with the required accuracy at Sea State 2 Continuous stay afloat for 7 hours with the running engine

Water jet propellers develop 10 km/h speed afloat The BMP-3F design allows the vehicle to come out to coast under rough sea conditions and to tow the same-type vehicle A new main sight SOZH with an integrated laser range finder and an ATGM guidance channel is installed