Yes, the company is asking for the ability to have up to a 16 hour duty day. (Duty day is defined as the time you "checkin" or brief at the beginning of your day until your last flight lands in whatever city you may be spending the night. Checkin times vary based on widebody or narrowbody aircraft and whether or not you are flying domestic or international flight.) UA wants to be able to schedule us up to 14 hours on duty, but you may actually be on duty up to 16 hours should irrops (irregular operations) occur.