American Maritime Officers
Based in USA, Dania Beach
IAM
Based in USA, Upper Marlboro
International Longshore and Warehouse Union
Based in USA, San Francisco
International Longshoremen's Association
Based in USA, North Bergen
International Organization of Masters, Mates & Pilots, AFL-CIO
Based in USA, Linthicum Heights
Marine Engineers' Beneficial Association
Based in USA, Washington DC
Seafarers' International Union
Based in USA, Camp Springs