(2018-2020) Embedded System of Ocean Bottom Unit Tsunami Early Warning Systems

From 2018 to 2020, I worked on the embedded system for an Ocean Bottom Unit (OBU) as part of the Indonesia Tsunami Early Warning System. The OBU is the subsea electronics unit that interfaces with ocean-bottom sensors and supports communication with the surface buoy system.

My role focused on the embedded electronics, including board preparation, connector mapping, power routing, sensor interfaces, and integration testing. The system needed to be robust enough for marine deployment while keeping the electronics maintainable for testing and troubleshooting before installation.

Ocean Bottom Unit wiring and connector integration

Internal OBU wiring and labeled connector interfaces for power, sensors, and communication links.

The custom OBU electronics board was designed to connect multiple subsystems, including pressure sensing, seismic sensing, control logic, and external communication ports. These modules were assembled into an enclosure for bench testing before being integrated into the full tsunami early-warning architecture.

OBU electronics module installed in its enclosure

Custom OBU board for the Ina-TEWS program

Embedded electronics for the OBU, including the custom control board, labeled ports, and sensor interface circuitry.

This project strengthened my experience in embedded hardware development for harsh environments, especially in system integration, connector-level debugging, sensor interfacing, and reliable electronics packaging for ocean monitoring systems.

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