They can refuel ships at sea so I assume they can keep the jet fuel topped up. They don't have any ability to reload ship-launched missiles at sea, though, so if they run out they have to go back to a port with the capability to resupply those. I understand they fire two anti-missile missiles for every interception attempt, so it seems pretty likely they'd have ripped through their magazines pretty quickly.
They can refuel ships at sea so I assume they can keep the jet fuel topped up. They don't have any ability to reload ship-launched missiles at sea, though, so if they run out they have to go back to a port with the capability to resupply those. I understand they fire two anti-missile missiles for every interception attempt, so it seems pretty likely they'd have ripped through their magazines pretty quickly.