Underwater Robot Measures Ice Thickness

ETH Zürich
ETH ZürichMay 26, 2026

Why It Matters

Accurate, low‑risk ice‑thickness data improves climate model reliability while training the next generation of engineers.

Key Takeaways

  • Underwater robot measures ice thickness without human on‑ice exposure.
  • Device docks on ice sheet, using torpedo‑shaped housing and sensors.
  • Student team Polaris combines mechanical and electrical engineering expertise.
  • Data aims to improve climate models by filling measurement gaps.
  • Project emphasizes hands‑on learning and potential discovery of new variables.

Summary

The video showcases a Zermatt test of an underwater robot designed to measure ice thickness from below, eliminating the need for personnel to step onto potentially hazardous ice surfaces.

The robot, nicknamed Polaris, is housed in a torpedo‑shaped shell containing electronics, propellers, and an array of sensors. It propels forward, docks onto the ice sheet, and records thickness data. The ten‑member student team comprises eight mechanical and two electrical engineers, blending design, control, and instrumentation expertise.

Team members stress the hands‑on nature of the project, with one noting, “I didn’t just want to learn theory, I also wanted to do something with my hands.” They hope the system will capture rarely‑collected ice data and possibly reveal new variables for climate modeling.

If successful, the robot could provide safer, more frequent ice‑thickness measurements, feeding higher‑resolution inputs into climate models and advancing both scientific understanding and student engineering experience.

Original Description

As part of the Polaris Focus Project, a team of ETH students is developing an autonomous underwater robot to accurately measure ice thickness from beneath the surface. The aim is to generate new data to support climate research.
Video: Jaap Oudman, Nicole Davidson / ETH Zürich

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