Alerts & Learnings IMCA: Umbilical support frame made contact with passing vehicle on public road Whilst travelling, a contractor transporting umbilical support frames (USFs) made contact with a passing vehicle as one of the frames dropped down. To view this IMCA alert in full and download the Step Change in Safety Verifications of Learning and Feedback Form, click 'Download Alert' button above. Download Alert Share: Share on Linkedin Share on Facebook Share on Twitter Share with Email