Unless you're South African, you may not appreciate the tugboat's name. The first part of the name is a common South African surname (similar to Smith), and the second part (Amandla) is a Xhosa and Zulu word meaning Power. So together, they mean Smit Power. Awesome name for a tugboat hey?! :)
What's especially memorable about the word amandla is that it's part of a war cry (of sorts) adopted by members of the ANC during the apartheid times. Back then, and now sometimes also, the leader of a group of people would shout out "Amandla!" and the crowd would respond with "Awethu!", which together mean "Power to the people!".