Harold Bindloss 
Secret of the Reef [PDF ebook] 

Sailor Jimmy Farquhar has enjoyed a period of relative calm in his life, serving on a series of problem-free cargo runs and striking up a burgeoning relationship with a beautiful passenger on one trip. But when a colleague proposes a salvage job that would entail traveling into icy, treacherous northern waters, Jimmy decides to throw caution to the wind and give it a shot.