The aircraft carrier USS Abraham Lincoln has become a survival test for nearly 5,000 American sailors — The GuardianThe aircraft carrier has been at sea for more than 250 days without a full port call.Onboard, there are reports of water and supply shortages, problems with toilets and plumbing, and a drop in morale and deteriorating psychological state among the crew.Amidst the nearly nine-month deployment, there have been reports of several sailors attempting to jump overboard.