Half mast? Do we live on a giant boat?
I’m sorry, but you’re wrong: “On land, flags fly at half-staff as a symbol of mourning. On ships, flags fly at half-mast either in mourning or to signal distress. The terms are often mixed up. While it works to say a ship’s half-mast flag is at half-staff (because a mast is a sort of staff), flags on land cannot be at half-mast (because they are not hung on masts).” http://grammarist.com/usage/half-mast-half-staff/