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

If you'd like to refine this into a more formal research paper, I can help you: Add a detailed of magnetic compensation. binnacle

A binnacle is a waist-high stand or housing on the deck of a ship, traditionally used to hold and protect the ship's magnetic compass and other navigational instruments. This draft explores its history, mechanical design, and its transition from a critical tool of exploration to a modern fixture of yachting and maritime heritage. History and Purpose : High-quality binnacles were often made of brass