Calling all San Diego sailors: If you’ve got some free time Tuesday evening, TV network TNT is holding an open casting call for extras for its Navy-themed show “The Last Ship,” according to a Monday post on the Naval Base San Diego Facebook page. From 2 p.m. to 8 p.m., sailors are invited to drop in to Building 45 at the Recreation Center NBSD, in the Blue and Gold Conference rooms. Applicants must bring an I-9 form (downloadable here) and written permission from their chain of command to participate. Also, you have to be on authorized leave or liberty, so don’t…