If the city of S.B. were looking for a theme song, it might find one here on David Courtenay’s new album, Godspeed. With seven tunes of breezily confident new-age classic rock, Courtenay’s work encapsulates the spiritualized sheen of postcard-perfect harbor sunsets paired with upper-deck cocktails. Courtenay’s band, The Castawaves, shine on guitar and brass. Admittedly, some of the songs fall into messianic MOR (middle of the road) or bedroom-woman-wooing territory, and Courtenay would do well to humble his more rock-star side to his meditational qualities. But for what it is, it works and should be shared upon a gentle sea with friends and loved ones, and under a celebratory sky.