Here is the Polish Tier 2 LT (odd choice, considering this vehicle was designed as a lighttank killer). And yes, it is apparently going to have Polish crews.
First of all, he kept the two dolphins together in the same tank and taught them to press levers whenever they saw a light.
首先，他把两只海豚放在同一个水箱里，教它们无论什么时候看到光就按控制杆。
3
The researchers used a machine called an "electroretinogram" to test the field of vision - firing a tiny beam of light at the shark in a darkened tank from all directions.