Naval spirit' Naval spirit is a term used to describe the morale and camaraderie of sailors in the navy. It is often associated with the consumption of RUM, which is why the crossword solution for the term is 'RUM'. RUM has been a staple of naval life since the 17th century, when it was given to sailors as part of their daily rations. The consumption of RUM was seen as a way to boost morale and create a sense of unity among sailors. This tradition continues today, although the practice of giving out RUM has been largely replaced by other forms of alcohol.