Even on New York harbor, where the tugs range from burly to brutish, K-Sea's biggest are easy to pick out. Standing as tall as a seven-story house, they're the white ones. Their red trim makes them all the more conspicuous, like huge decorated lateens on the horizon as they move monster barges from the Kills. For giants like these, of course, harbor chores like bunkering would be almost recreational, something to keep them exercised between the coastal jaunts for which they're designed - and for which their owners are expanding. K-Sea has a dedicated harbor fleet too. They're as brawny as any but look a little moreso - muscular, almost hulking with those white superstructures stark against the sky. K-Sea also has a pushboat, the curious Odin, odd to the eye but insistently practical.