What this record means
The record shows that the mark SEA was abandoned, so it is not live, registered, pending or cancelled, and the applicant listed was the Professional Association of Sports Educators, a California corporation. The only goods shown are printed materials—specifically certificates for providing certifications for skin diving and diving—filed in International Class 016, and the first commercial use was in September 1983. Because the protection was limited to those diving‑related certificates, a similar name used for unrelated products or services would create the closest record‑based concern only in the narrow area of printed certification documents for diving; it does not give the owner control over the word SEA in other contexts. The prosecution history shows a non‑final office action mailed in March 1984, assignment to an examiner, and then an abandonment on October 18 1984 for failure to respond, which is the latest meaningful status event. No oppositions, cancellations or court actions appear in the supplied history. I'd treat this as a modest concern if you plan to use SEA for any printed diving‑certification material, but the risk is far lower for other goods or services.
Informational only - not legal advice.