system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do large military ships/vessels use nuclear power but same size or larger cruise/cargo ships don't?
gpt
Nuclear power is difficult to do safely and the government will allow its own ships to do things private organizations can't. Also nuclear power means a warship can't be starved for fuel which is of strategic importance while cargo ships don't really worry about enemy forces cutting off their supply lines.