Binnacle -

: High-quality binnacles were often made of brass or copper to remain non-magnetic and withstand harsh salt-spray environments. Evolution in Modern Sailing

In contemporary maritime use, the binnacle has evolved beyond a simple compass housing. binnacle

: These spheres act as "compensators" to neutralize the magnetic interference from the ship’s own hull. : High-quality binnacles were often made of brass

One of the most recognizable designs is the Kelvin-White binnacle, which features two distinctive iron spheres—often called "Navigator’s Balls" or Flinders bars. binnacle