AUV Sentry — LLMpedia

AUV Sentry
Name	Sentry
Ship class	Autonomous underwater vehicle
Operator	Woods Hole Oceanographic Institution, United States Navy
Builder	Woods Hole Oceanographic Institution
Length	3.2 m
Speed	5 kn
Complement	0 (autonomous)

Contents

AUV Sentry Sentry is an autonomous underwater vehicle developed by the Woods Hole Oceanographic Institution for high-resolution seabed mapping, imaging, and oceanographic research. It has been used in collaborations with institutions such as the Naval Research Laboratory, Scripps Institution of Oceanography, and agencies including the National Oceanic and Atmospheric Administration and the United States Navy. Sentry operates in support of expeditions led by organizations like the Monterey Bay Aquarium Research Institute, the Smithsonian Institution, and international partners such as the GEOMAR Helmholtz Centre for Ocean Research Kiel.

Overview

Sentry was conceived at Woods Hole Oceanographic Institution to bridge gaps between towed systems like the Kongsberg Maritime towed sonar arrays and larger autonomous platforms such as the REMUS family and the Bluefin Robotics AUVs. It is optimized for missions following precedents set by institutions including Lamont–Doherty Earth Observatory, Scripps Institution of Oceanography, and the National Oceanography Centre, offering capabilities complementary to platforms used by the United States Geological Survey and the Monterey Bay Aquarium Research Institute. Sentry supports scientific objectives associated with projects led by the Integrated Ocean Drilling Program, the Ocean Observatories Initiative, and expeditionary efforts like those of the Challenger Society and the International Hydrographic Organization.

Sentry's hull, propulsion, and navigation design draw on technologies used by manufacturers and research programs such as Kongsberg Maritime, Teledyne Technologies, and the Office of Naval Research. The platform integrates inertial navigation systems from vendors used by Naval Research Laboratory programs and utilizes acoustic positioning approaches compatible with Ultra Short BaseLine and Long Baseline systems employed by the National Oceanic and Atmospheric Administration and United States Navy survey operations. Its dimensions and endurance place it between small vehicles like SeaBED and larger systems like the Autonomous Underwater Glider classes developed at Scripps Institution of Oceanography and Woods Hole.

Sentry has participated in expeditions including deep-sea mapping missions alongside vessels such as RV Atlantis (AGOR-25), RV Knorr (AGOR-15), and RV Polarstern. It has been deployed in studies of features investigated by projects like the International Seabed Authority-related surveys, research into sites of interest to the United Nations Educational, Scientific and Cultural Organization's marine programs, and targeted missions associated with the Deepwater Horizon response and subsequent environmental assessments. Collaborations have linked Sentry operations with teams from Harvard University, Massachusetts Institute of Technology, and the University of Hawaii.

Sentry supports bathymetric mapping, benthic habitat characterization, archeological surveys, and hydrothermal vent studies undertaken by partnerships including NOAA Office of Ocean Exploration and Research, the Monterey Bay Aquarium Research Institute, and the Smithsonian Institution. It has been used in investigations relevant to the International Seabed Authority and environmental monitoring in contexts involving the Deepwater Horizon spill, marine protected area surveys connected to National Marine Sanctuaries, and baseline studies for initiatives akin to the Global Ocean Observing System. Scientific teams from institutions such as Woods Hole Oceanographic Institution, Scripps Institution of Oceanography, University of Washington, and University of Southampton have used Sentry data to inform publications in journals associated with organizations like the American Geophysical Union and the Royal Society.

Sentry carries payloads including multibeam echosounders comparable to models used by Kongsberg, side-scan sonar systems employed in surveys by the United States Geological Survey, and high-definition optical imagers akin to those developed at WHOI and MBARI. It supports chemical sensors used in studies by the National Oceanic and Atmospheric Administration and biological samplers similar to equipment from the Smithsonian Institution and the Monterey Bay Aquarium Research Institute. Navigation and geolocation are enabled via integration with systems used by the Naval Research Laboratory and acoustic networks deployed by agencies like NOAA.

Sentry deployments have been launched from research vessels including RV Atlantis (AGOR-25), RV Neil Armstrong (AGOR-27), RV Knorr (AGOR-15), and ice-capable ships like RV Polarstern for polar missions. Support roles have included collaborations with navies and agencies such as the United States Navy, National Oceanic and Atmospheric Administration, and international research fleets from institutions like GEOMAR Helmholtz Centre for Ocean Research Kiel and the National Institute of Oceanography (India). Launch and recovery procedures follow practices established by groups such as Monterey Bay Aquarium Research Institute and the Office of Naval Research.

Over time, incremental upgrades to Sentry's sensors, battery systems, and autonomy software have paralleled developments in platforms from Bluefin Robotics, the REMUS series, and research initiatives at Scripps Institution of Oceanography and Woods Hole Oceanographic Institution. Collaborative projects with agencies including the Office of Naval Research, Naval Research Laboratory, and research institutes like MBARI have explored enhanced autonomy, extended endurance, and integrated payload bays for deeper surveys akin to capabilities seen in vehicles used by the Monterey Bay Aquarium Research Institute and commercial suppliers such as Teledyne.