The antonyms for the word "more ocean-going" could be "less seafaring," "landlocked," or "inland." These terms suggest a lack of proximity or connection to bodies of water, and a preference for terrestrial environments. "Less seafaring" implies a diminished interest or skill in navigating open waters, while "inland" and "landlocked" indicate a complete absence of coastlines, harbors, or ports nearby. Some other possible antonyms could include "terrestrial," "continental," or "inland-oriented," emphasizing the absence of marine influences and the dominance of land-based features. In a larger sense, these antonyms reflect a distinction between oceanic and continental environments, which can have significant implications for climate, ecology, and human activity.