What this record means
The record shows that the mark SEA is cancelled, not live, and was owned by SAFETY ENGINEERING ASSOCIATES, INC., a Wisconsin corporation; its registration on the Principal Register was cancelled on Feb 16 2008 because the owner failed to file an acceptable Section 8 declaration. The only goods and services listed are consulting services in the field of accident investigation and analysis, product safety testing and analysis, product design engineering, and roadway design, all under class 042, so a similar name used for those types of scientific‑technology consulting would raise the closest record‑based concern. The record does not give the owner control over every possible use of the word “SEA,” especially in unrelated industries. There is no Supplemental Register activity shown, and the prosecution history simply tracks the original filing, publication, registration and the eventual cancellation. The supplied history contains no oppositions, cancellations by third parties, or court actions, so no enforcement signal appears. I'd treat this as a meaningful concern if you plan to offer comparable consulting services under a similar name.
Informational only - not legal advice.