Public engineering firm profile
Lake Forest Park, WA
Hydrographic Surveyors
Fenn Enterprises is a hydrographic survey specialist based in Washington state, specializing in sidescan sonar surveys, ROV operations, and derelict fishing gear recovery across Puget Sound and the broader Salish Sea. It operates two specialized survey vessels - a 44-foot aluminum vessel and a 24-foot trailerable skiff - outfitted with sidescan sonar, multibeam sonar, sub-bottom profilers, and ROVs. Fenn Enterprises also manufactures custom marine survey equipment through its Sea Gear brand, including sidescan towfish and winches, and has provided sidescan sonar training for international organizations including the World Wildlife Fund.
Sidescan sonar and multibeam sonar surveys of seafloor and underwater environments, including sub-bottom profiling and acoustic tracking.
Remote operated vehicle services featuring unoccupied, highly maneuverable submersibles linked by umbilical cables to support deep-water investigations.
Survey and environmental removal of lost fishing nets and crab pots from marine habitats using sonar detection and specialized dive teams.
Field training workshops covering sidescan sonar operation, ROV operations, and specialized underwater recovery protocols.
Design and fabrication of high-performance marine instrumentation and deployment systems under the Sea Gear brand.
2021 | Port Susan and Similk Bay, WA | Environmental & Remediation
Sidescan sonar surveys followed by derelict crab pot recovery in Port Susan and Similk Bay, recovering hundreds of pots and releasing live Dungeness crab.
View project source2020 | Puget Sound, WA | NOAA Fisheries | Federal
Recovery and redeployment of 34 NOAA Fisheries hydrophones using a Phantom 2+2 ROV in water as deep as 948 feet.
View project source2019 | Seattle, WA and Germany | World Wildlife Fund | Natural Resources
Multi-session training workshops for World Wildlife Fund teams covering sidescan sonar operation, ROV use for deep net recovery, and ghost gear survey protocols.
View project source2019 | Mukilteo, WA | Natural Resources
Utilized a Phantom ROV to perform deep-water shrimp pot target surveys to film targets for rock fish presence and recover pots for biological evaluation.
View project source