the lowest grade of seaman in the merchant marine; the grade below able seaman

A seaman, especially one in the merchant navy, who has been trained or certified in all routine duties; a member of the Royal Navy rated between ordinary seaman and leading seaman or boatswain's mate

(mineralogy) An orthorhombic-dipyramidal mineral containing boron, hydrogen, manganese, oxygen, and phosphorus.

Befitting a seaman. / indicating competent seamanship.

(nautical) Skill in, and knowledge of, the work of navigating, maintaining, and operating a vessel at sea.

seamanlike

plural of seamanship