Open marine hardware
Sailing robots, ocean drones and the sensors aboard
Protei documents open-source marine technology in plain words — build notes, gear guides and honest reviews of the hulls, rigs and instruments that go to sea.
Sailing robots
Wind-driven hulls and ocean drones: rigs, steering, power and what a long swell does to all three.
Read the notes →Sensing hardware
Environmental sensing kit aboard small craft — mounting, logging, drift and the calibration that keeps it honest.
Read the notes →From the workshop
What gets documented here is the part that usually happens off camera: the hull that leaked, the sensor that drifted, the fix that held through a second day of swell. Parts are named, methods are described in the order things actually happened, and the failures worth repeating are left in.
Go to the latest notes →Just off the bench
Latest from the water
Newest write-ups first — sea trials, teardowns and the gear that earns its place aboard.
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