I'm seeing "air draft" being used quite often now-a-days. I'm used to using "vertical clearance". I know what it means, but has "air draft" become "proper" terminology now, or is it just a term introduced and used by those not in the know? *RUDY & JILL SECHEZ* *BRINEY BUG-a 34' Sail-Assisted Trawler * *850-832-7748* TrawlerFest MD TRAWLER TRAINING and ANCHORING CONSULTANTS ANCHORING-"A Ground Tackler's Apprentice"- E-Book or Hard Copy <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>