Open Arsenal

No Owners. Just Builders.

Crosswater is an open-source autonomous amphibious vehicle platform designed to operate across both land and water as a unified mobility system. It combines electric propulsion, modular hardware design, and an open autonomy software stack to create a vehicle that can adapt to environments where traditional infrastructure breaks down or does not exist. The goal is to build a shared engineering foundation for resilient transportation in a changing world, from flood-prone cities to coastal regions and remote waterways.

At its core, Crosswater is built around a dual-environment architecture. On land, it functions as an electric vehicle with independent traction control and precise drive-by-wire handling. On water, it transitions into a stabilized marine platform using electric thrusters for vector-based navigation and maneuvering. A catamaran-style hull provides stability and buoyancy, while modular structural components allow for scalable designs depending on use case, size, and mission requirements.

The system integrates a full autonomous navigation stack supported by sensor fusion from LiDAR, radar, sonar, RTK GPS, and vision systems. This allows Crosswater to perceive and interpret both terrestrial and aquatic environments in real time. The autonomy layer handles obstacle detection, path planning, water current compensation, docking procedures, and emergency fallback behaviors, enabling operation in dynamic and unpredictable conditions.

All of this is built on a modular hardware and software philosophy. Power systems are fully electric with swappable battery modules, regenerative capabilities, and optional renewable charging support. Compute and control systems are distributed across redundant safety controllers and edge AI processors. Every subsystem—from propulsion to sensors to navigation—is designed to be replaceable, documented, and open for community improvement.

Released under the AGPL-3.0+ license, Crosswater is intended to remain fully open at every layer, ensuring that improvements, forks, and deployed systems contribute back to the commons. It is not a closed product, but a shared platform for engineers, researchers, and builders working toward resilient, adaptable mobility infrastructure.