page_title: Douglas Dolphin
section_title: Operational history
hierarchical_section_title: Douglas Dolphin / Operational history
caption_attribution_description: A U.S. Coast Guard Douglas RD-1 Dolphin in flight.
context_page_description: The Douglas Dolphin was an amphibious flying boat. While only 58 were built, they served a wide variety of roles: private 'air yacht', airliner, military transport, and search and rescue.
context_section_description: The first two were purchased by Wilmington-Catalina Airlines to fly passengers between Los Angeles and Santa Catalina Island, becoming the first successful Douglas airliners. Subsequent examples were ordered by the United States Navy and U.S. Coast Guard for use as transports and search and rescue craft.  The U.S. Army Air Corps ordered several under the designations C-21, C-26, and C-29. Many were eventually ordered for their original purpose as luxury transports. Owners included William Boeing, the founder of the Boeing Company, and Philip K. Wrigley, the son of the founder of the Wm. Wrigley Jr. Company. William K. Vanderbilt bought two with custom interiors for use from the Vanderbilt yacht Alva as flying tenders.
  One was procured by the U.S. Navy as a transport for President Franklin D. Roosevelt. Although never used by Roosevelt, this was the first aircraft procured to provide transportation for the President of the United States.
  In 1933, landing in heavy seas, the USCG RD-4 undertook some rescues of merchant sailors at sea, feats that made spectacular news reports, enthralling the American public.
caption: A U.S. Coast Guard RD-1.
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