It looks like "bring wave" was a typo or misprint. I found a copy of the original print edition of Three Sea Songs (its a small chap-book), and it reads " ... your good ship on a briny wave ..." So it looks like a typo was made somewhere along the line. I know of at least one historical narrative monologue that has used the term "bring wave" -- maybe it will continue on ...
Thanks for the interest and ideas. Hard to fool mudcatters.