In 1961, Petersen joined the
United States Coast and Geodetic Survey, accepting a
commission as an
ensign in the
United States Coast and Geodetic Survey Corps. In 1971, he received a
master's degree in marine affairs from the
University of Rhode Island. During his career, Petersen served aboard five different ships of the Coast and Geodetic Survey fleet and later the
NOAA fleet, and during the 1970s and 1980s he served tours as
commanding officer of the
research ships
NOAAS Miller Freeman (R 223) — the first NOAA Corps officer to command her While he was in command of
Miller Freeman, he and his ship came to assistance of disabled
fishing vessel in the
Bering Sea during a storm, and a crew member took a dramatic photograph of
Miller Freeman cresting a large wave as she approached the fishing vessel. and retired from NOAA. Petersen's career had included stints in the pre-NOAA Coast and Geodetic Survey and in NOAA's
National Ocean Service,
Office of Oceanic and Atmospheric Research,
National Marine Fisheries Service, and
Office of Marine and Aviation Operations, with assignments in many locations in the
continental United States,
Hawaii, and
England and a wide variety of duties that at various times included
cartographic,
geodetic,
hydrographic,
meteorological,
oceanographic, and operational positions. During his career, he established a reputation as a self-effacing leader who was quick to defer credit for success to his subordinates. He was known for his passion for and vocal advocacy of NOAA science. ==Personal life==