On a silver-plated chain dangles an "ocean blue" heart pendant made of glass and reminiscent of the fictional jewel used as a plot device in Mr. Cameron's movie.
The Trade Winds Solo Round Britain Challenge is raising funds for five charities - Parkinson's UK, Cancer Research UK, MS Society, British Heart Foundation and Ocean Youth Trust Scotland.
Storm surges have the potential to be dangerous because they involve a great upwelling of a stretch of ocean - intense low pressure at the heart of a storm literally tugs the sea surface above its normal level to create a massive bulge.
Mera has invested money in causes dear to her heart: a marine fish farming group, a company that looks for cancer treatments in products from the ocean, and a maker of a fingerprinting system for newborns.