The uncrewed, autonomous, Saildrone Surveyor arrived in Hawaii July 9 after a groundbreaking maiden voyage from San Francisco to Honolulu. It is a new, much larger class of vehicle optimized for deep-ocean mapping. During the 28-day voyage, the ship sailed 2,250 nautical miles and mapped 6,400 square nautical miles of seafloor.
Using renewable wind and solar energy for its primary power source, the ship is capable of long-endurance, uncrewed ocean mapping operations. The data it collects will help address issues impacting our world including climate change, offshore renewable energy, natural resource management, and maritime safety.
Measuring 72 feet long (22 m) and weighing 14 tons, the ship carries a sophisticated array of acoustic instruments, normally carried by large, manned survey ships. The Surveyor’s sensors interrogate the water column looking at underwater ecosystems and map the seafloor in high resolution to a depth of 23,000 feet (7,000 m).
Multibeam data from the ship has been calibrated and assessed by an external team from the University of New Hampshire (UNH), which normally calibrates large government survey vessels. “The data quality from the Surveyor is of very high quality, as good as anything we have seen from a ship,” said Larry Mayer, director for the UNH Center for Coastal and Ocean Mapping (CCOM). “Due to the wind-powered nature of the vehicle, it is very quiet, and this enables the very accurate acoustic measurements needed to map to these depths.”
The ocean covers more than 70% of the planet, but over 80% remains unmapped and unexplored. The lack of ocean exploration is largely due to the high cost of access to our oceans, which has traditionally been undertaken by large ships. These ships can cost hundreds of millions of dollars to build and hundreds of thousands of dollars per day to operate. The Saildrone Surveyor represents a paradigm shift in the cost of ocean access, performing the same job as a survey ship, but at a fraction of the cost and carbon footprint.
With this successful proof of concept voyage, Saildrone, Inc. of California, will now build a fleet of Surveyors to be manufactured at US shipyards. The company intends to map the entire earth’s oceans in the next 10 years.