This is one of the many Seaquest DSV crew ballcap's used by various actor's throughout the show's 3 seasons. Part of the uniform for all Seaquest military personal, these crew ballcap's were required to worn during duty on the Seaquest and also during offshore missions. This would allow Seaquest personal to be distinguish from other UEO personal.
A tag list's this ballcap as being produced by New Era and the ballcap's design is from the Major League Pro range of ballcap's.