Which item is NOT typically used for boat repairs?

Charts are typically not used for boat repairs as they primarily serve as navigational aids, providing information about waterways, maritime hazards, and geographic features. They help sailors plan routes and understand the area they are navigating, rather than functioning as tools or materials for repairing a boat.

In contrast, WD-40 is often used for lubrication and as a rust preventative, making it useful in maintaining moving parts or freeing stuck components. A multimeter is an essential tool for diagnosing electrical issues on a boat, allowing sailors to measure voltage, current, and resistance in electrical circuits, which is crucial for identifying problems with electrical systems. Cotter pins are a specific fastener used to secure machinery components and prevent them from becoming dislodged, making them important in the structural integrity and functionality of various boat mechanisms.