Well known American landscape painter Joseph McGurl works both in plein air an larger studio compositions. McGurl draws on the traditions of the American landscape painters of the 19th century, but in his pursuit of light, has a fresh, contemporary approach.
McGurl is based on Cape Cod, and many of his scenes are of the coast. Some of them are painted from the deck of his 44 foot sailboat Atelier.
His website has examples of his work in plein air and in the studio, and you can find others on the sites of the galleries in which he is represented (linked below).