What this record means
The record shows that the mark SEA has been cancelled, so it is not a live registration; the last status entry on Dec 08, 2017 notes that the registration was cancelled because the owner, Duncan McIntosh Company, Inc., did not file a required Section 8 declaration. The registration covered Class 016 “Paper Goods & Printed Matter” and specifically listed “Magazine, directed to persons owning motor boats, sailboats, and yachts of all sizes and types and for use in a variety of waters.” A similar name used for boating‑related publications would be the closest area of concern, while uses in unrelated fields such as clothing or software fall farther from the scope shown. Because the mark was on the Principal Register and later cancelled, the record does not give the owner control over every use of the word “SEA.” The latest meaningful event is the cancellation notice in December 2017, and the supplied history shows no oppositions, cancellations by third parties, or other enforcement actions. I'd treat this as a moderate concern if you plan a boating‑magazine title, but the risk drops sharply for unrelated goods or services.
Informational only - not legal advice.