Portable Altimeter

Cost
5 gp
Weight
3 lbs

This device has a number of air bladders inside it, allowing it to measure relative altitude. The pressure-sensitive device can also detect when bad weather is coming, giving advance warning of snow and other storms. You can accurately read the device with a DC 10 Engineering or Survival. A successful read grants you an expertise die on checks and saving throws to navigate snow storms or similar conditions. However, if you take thunder damage, the device is damaged. It can be repaired with a DC 10 jeweler’s tools check.

Source
Gate Pass Gazette

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