His Compass by Con Riley

Tom has one rule: don’t sleep with the crew. A second chance with a younger, gorgeous deckhand tempts him to break it.

After a busy season as a charter-hire skipper, Tom yearns for some downtime. His lonely heart also aches for adventure with someone special, but paying his bills has to come first. A surprise sailing contract and huge bonus offer his first glimpse of freedom for years. There’s only one catch: he must crew with Nick, a deckhand who jumped ship once already.
Nick’s as young and untested as the new yacht they’re contracted to sail, and he’s just as gorgeous. Forced to spend a month as Nick’s captain, Tom discovers depths he hadn’t noticed. He’s captivated, and happier sailing with Nick than he’s been in forever. However, their voyage is finite, and both men keep soul-deep secrets.
As the contract draws to an end, they must get honest about what’s in their hearts if they want to share a life at sea, and love, forever.