The major components in this subsystem are:

• Watec Super Low Light Monochrome IP Camera (x2)

• Tamron 2.8-12mm Aspherical Varifocal Lens (x2)

• Hamamatsu SiPM Optical Measurement Module

• Waveshare 32Bit Analog-Digital Converter

• 3D-Printed Camera Tray

• 3D-Printed OMM Case

The subsystem assembled using the components above facilitate low-light recording of bio-luminescent signals. Raw footage from two synchronised cameras and ostracod emission intensity measurements from Silicon Photomultiplier (SiPM) are sent to the computer system for processing and storage.

The major components in this subsystem are:

• NVIDIA Jetson Nano Developer Kit

• BotBlox 5-Port 1 Gbps Network Switch

• Sandisk 1TB Portable SSD

• Waveshare AMOLED Display

• Blue Robotics Underwater Turn Switch

• OpenCV-Python (Software)

• GStreamer (Software)

Data from the stereo imaging system is synchronized and stored as stereo vision footage and time-resolved ostracod emission pulses that correspond to the footage. This subsystem provides a user interface as well a interfaces with all other subsystems.

The major components in this subsystem are:

• Blue Robotics 4" Diameter Acrylic Enclosure and Vacuum Plugs

• High Flow Peristaltic Pump

• Tee Barb and Luer-to-Barb Fittings

• EnviroDNA eDNA Sampling Kit

• MOSFET Trigger Switch

• Flow Rate Meter

• High-Temp PUR Subsea Cable

The DNA collection system is in a separate enclosure for modularity. Design focus was on optimal compactness and high flow rate. Rollers are used to pump controlled pulses of water at ~200 mL / minute to the eDNA sampling filter. 

The major components in this subsystem are:

• Blue Robotics 6-Inch Diameter Acrylic Enclosure

• Blue Robotics 10mm Penetrators (x15)

• Blue Robotics 6.5mm Penetrators (x2)

Enclosure design was optimized to minimize buoyancy and to completely contain all required components and wiring for bioluminescence stereo imaging. The internal tray was designed in Autodesk Fusion 360 and 3D printed at the CE Capstone Lab.

The major components in this subsystem are:

• 5000mAh 22.2 V Lithium Polymer Battery (x2)

• Battery Safety Bag

• Parallel Battery Plug

• Valefod LM2596 DC Voltage Regulator and Buck Converter

• 2.8 mm Wire Connectors (Various Quantities, 2 ~ 9 Pins)

• 24 AWG Stranded Wire Car Electrical Wire

small · e will travel around the world to conduct field research in various oceans. Airport security requirements limit the maximum power rating of individual batteries that could be transported by plane. The wattage of two batteries are distributed to all components to facilitate a maximum runtime exceeding 12 hours.