Cargo snips have changed somewhat, it's true, since the first-rate Zim and Skelly book of that title in 1970--and Ancona does crisply lay out the various kinds, what they carry, and how they're loaded. In a second, separate section we get a similar catalogue of the crew, department by department. (e.g., in the Engine Department: ""The First Assistant Engineer is in charge of the engine room. He sees to it that all work and repairs are done. The Second Assistant Engineer is the boiler expert. He maintains the boiler and keeps the pipes and plumbing in good order."") At the outset, Ancona makes an apt observation: ""Ships need cargoes, and cargoes need ships."" Nothing that follows, unfortunately, is other than mechanical. Because Ancona is particularly cognizant of the ship/cargo connection, we get detailed explanations of such specialized vessels as the container ro-ro--where cars and other rolling stock (ro-ro means roll on, roll off) go in the waste-space left by rectangular containers. This kind of technical information is not without interest, and Ancona as usual provides sharp, precisely illustrative photos; but the whole world of cargo shipping is fitted into Zim and Skelly's tight little volume.