The four-stamp design on this pane features types of vessels that have formed an important part of merchant marine history: clipper ships, auxiliary steamships, Liberty ships, and container ships.
The Matson ship stamp is based on an undated photograph of the R.J. Pfeiffer, a modern container ship launched in 1992 and operated by Matson Navigation Company.
The U.S. Merchant Marine stamps are being issued as Forever stamps. Forever stamps are always equal in value to the current First-Class Mail one-ounce rate.