NOAAâ€™s survey effort in the area began in 2006 with the Gulf of Esquilbel and has continued south over recent years. Rainierâ€™s sophisticated sonar systems enable precise measurement of ocean depth and the creation of 3-D digital terrain models of the sea floor that reveals details about the underwater landscape and potential hazards to navigation. The first surveys of the area took place in the early 1900s. Depths were acquired with lead lines, a method that was accurate at the point of the sounding, but lacked information about the surrounding area.
Commissioned in 1968, Rainier is one of three ships in the NOAA fleet that conduct hydrographic surveys in support of the nautical charting mission of NOAAâ€™s Office of Coast Survey. Rainier last visited the area in 2009 before undergoing a year-long, $13.1-million major repair period during which the ship was outfitted with state-of-the-art equipment to conduct its survey missions with even greater efficiency and accuracy.
Equipped with five 29-foot survey boats and high precision sonar and positioning equipment, Rainier is one of the most productive survey platforms of its type in the world. Rainierâ€™s crew of 50 is comprised of NOAA Corps officers and civilian wage mariners, both licensed and unlicensed. The ship typically operates eight to nine months of the year in the coastal waters of Alaska and the Pacific Northwest.
NOAAâ€™s Office of Coast Survey, originally formed by President Thomas Jefferson in 1807, updates the nationâ€™s nautical charts, surveys the coastal seafloor, responds to maritime emergencies and searches for underwater obstructions and wreckage that pose a danger to navigation.
NOAAâ€™s mission is to understand and predict changes in the Earth’s environment, from the depths of the ocean to the surface of the sun, and to conserve and manage our coastal and marine resources. Join us on Facebook, Twitter and our other social media channels.