in MCA Oral Exam Questions What are the four GMDSS sea areas? by Ship Inspection Sea Areas A1, A2, A3 and A4. See more Previous article What is GMDSS Sea Area A1? Next article What are the main systems in the GMDSS? What do you think? -2 Points Upvote Downvote Browse and manage your votes from your Member Profile Page Written by Ship Inspection Leave a ReplyCancel replyYou must be logged in to post a comment.