Merchant Marine ID card Published November 9, 2022 at 600 × 407 in Hats off to the U.S. Merchant Marine! Merchant Marine ID card of seagoing cowboy Elmer Bowers obtained through the US Coast Guard, 1946. From the Peggy Reiff Miller collection. Merchant Marine ID card of seagoing cowboy Elmer Bowers obtained through the US Coast Guard, 1946. From the Peggy Reiff Miller collection.