You'll find 6 meanings mentioned in OED's entry to the noun masthead, two of that are labelled obsolete. See ‘That means & use’ for definitions, utilization, and quotation proof. This instance is from Wikipedia and could be reused below a CC BY-SA license. Inside of a cutter rig, the jib https://vnliezy.bluxeblog.com/58381396/new-step-by-step-map-for-masthead