The Collaborative International Dictionary of English v.0.48:
Seagoing \Sea"go`ing\, a. Going upon the sea; especially, sailing upon the deep sea; -- used in distinction from coasting or river, as applied to vessels. [1913 Webster]WordNet (r) 3.0 (2006):
seagoing adj 1: used on the high seas; "seafaring vessels" [syn: oceangoing, seafaring, seagoing]