CHALLENGES

Deploying and retrieving the sensor from underwater locations can be time-consuming and challenging. We have therefore chosen to attach our device to a buoy with the main housing located above water, in order for it to be easily deployed and retrieved. 

Deploying a device may require compliance with local, state, or federal regulations depending on where it is used. Regulatory compliance requirements that need to be followed may include obtaining permits and adhering to regulations on environment, data privacy, safety or national security. Please note that the regulations can vary widely depending on where the sensor is used, as well as on the purpose of the hydrophone sensor. We therefore recommend all users to consult with appropriate authorities to ensure that they are complying to all relevant regulations.

The hydrophone sensor used in the device must be accurately calibrated to ensure precise and reliable data collection. This calibration process can be time-consuming and require specialised equipment and expertise. We have addressed this issue by utilising a more expensive hydrophone as a reference for calibration. This may not be possible for most users, and in the future, we hope to offer a solution to this issue. This could for example be the option of using two hydrophones for comparison, or providing the users with another device/system to calibrate the hydrophone. Unfortunately, this isn't possible as high-quality hydrophones are not currently widely accessible in the market.

Ensuring that a device is completely waterproof is crucial for its proper operation and longevity. Any water leaks or infiltration can damage the electronics and render the device inoperable. While hydrophones are typically waterproof, the Raspberry Pi is highly sensitive to water, making it necessary to protect it from water damage. To minimize the risk of water damage and ensure the device's longevity, we have opted to place the Raspberry Pi above water, on a buoy. By doing so, we reduce the number of parts that need to be waterproofed. With the Raspberry Pi above water, we only need to focus on waterproofing the connections and cords between the Raspberry Pi and the hydrophone, as well as creating a robust casing for the Raspberry Pi. Moreover, placing the Raspberry Pi above water makes it easily accessible and maintainable as needed. If the device were submerged, it would be much more challenging to access and make necessary repairs or adjustments. By placing the Raspberry Pi above water, we can make any repairs or adjustments without difficulty, ensuring the proper operation of the hydrophone system.