Company

Hydrocord builds affordable, high-quality, customizable underwater acoustic sensing systems, field-tested across rivers, lakes, arctic waters, and open ocean. Acoustic monitoring can detect and quantify human interference - from radiated noise to illegal fishing - and support preservation within marine protected areas, while also revealing biodiversity and biomass patterns over both short and long timescales.

Hydrocord Floater

The Hydrocord Floater is a fully autonomous robotic platform for underwater acoustic monitoring. It holds position at a set depth, profiles the water column in steps, and reports back only when something worth reporting happens — no cellular reception, install crew, or ongoing maintenance visit required.

Physical / mechanical

  • Maintains depth up to 50 m, adjustable in 0.5 m increments
  • Profiles the water column in steps anywhere from 0-50 m
  • Anchored depth-keeping in currents up to 2 knots
  • 15 kg, 1 m length
  • Batteries detach for air transport

Sensing

  • Four synchronized hydrophones plus one projector
  • Onboard processing
  • Ascends on a user-defined event to report results via satellite comms

Usability

  • Fully configurable from any device over WiFi — no installation or cellular reception needed
  • Results downloadable directly on board
Configuring the Floater's mission settings from a phone over WiFi

Applications

Fish detection and biomass estimation

  • Schools and individual fish
  • 200 m radius
Fish width distribution and detection counts by distance

Soundscape measurement

To ISO standards – environmental and vessel radiated noise.

Sound pressure level and 1/3-octave spectrum graph

Blast fishing detection

Including angle-of-arrival.

Raw acoustic amplitude waveform showing a detected event

Cetacean detection and identification

Dolphins to 1 km, sperm whales to 12 km.

Humpback whale swimming near the surface

Vessel detection and type classification

Cargo ships to 10 km, recreational vessels to 2 km.

Cargo ship at sea

Video