The Polar Star, along with her sister ship the Polar Sea, are true tanks of the ocean and plow some of the harshest seas in the world without difficulty. 

Featuring 18,000 horsepower diesel engines and 75,000 horsepower through gas turbines, two inches of steel hull, and a unique design, the Polar Star can crush through the ice to make way for cargo ships or save vessels suck in the Antarctic ice. It also helps maintain access to US scientific bases in Antarctica. 

On February 13, the 39-year-old Polar Star once more entered the spotlight after it rescued an Australian fishing vessel. According to The Navy Times, the fishing boat was locked in between 12 to 15-foot ice that had another two feet of snow on top of it. 

Here's a look at one of the most unique vessels in the US military.