The PORTLAND is named after two famous seaport cities of the United States, Portland, Oregon, and Portland, Maine. The two cities' seals are appropriately a part of the ships' insigne. The seal of Portland, Oregon, presents the city as a major seaport through the sailing vessel. The fruitful lady is standing at the confluence of the Columbia River on whose waters flow the many industrial and agricultural products of the region. The fir trees represent the large lumber resources and Mt. Hood, the scenic attributes of the region. The seal of Portland, Maine, is one of heraldry. The phoenix (heron) symbolizes immortality. The anchor is frequently used in cities having a close relationship with the sea and in heraldry the anchor represents Hope. The dolphins symbolize Dilligence, Love, and Swittness. The ship is interpreted as representing the city as a great shipbuilding city.
On the left and right of the insigne are the Navy emblem and the Marine Corps emblem. These emblems together represent the joint efforts of these services in the performance of missions assigned the amphibious forces.
The stern view of the PORTLAND reveals the ship's characteristics inherent in the performance of its primary mission. The flooded well deck represents the ship's capability to launch, receive, and repair small cratt; the flight deck represents the ship's capability to launch and receive helicopters carrying cargo or Marines; the cranes symbolize the ship's ability to load and unload cargo rapidly.