US Merchant Marine role The US Merchant Marine role is often overlooked, yet it is vital for both national defense and global commerce. These civilian mariners and their vessels operate behind the scenes, ensuring the steady flow of goods across oceans while supporting military missions during times of conflict. Their unique position makes them essential contributors to economic stability and national security. Visit : https://nvdcrenewal.us/allies-at-sea-just-who-are-the-merchant-marines/