in MCA Oral Exam Questions Are chemical tanker COFs in the Harmonized System of Survey and Certification? by Ship Inspection 20.6k Views Yes. Share this: See more Previous article What surveys are required for chemical tanker Certificates of Fitness? Next article Under which IMO instrument is the (non-international) Certificate of Fitness for a chemical tanker issued? Written by Ship Inspection Leave a ReplyCancel replyYou must be logged in to post a comment.