Quote... military plane with 38 people on board has disappeared en route to Antarctica, Chile's air force says. The C-130 Hercules transport aircraft took off from Punta Arenas at 16:55 local time (19:55 GMT), and operators lost contact at 18:13 (21:13). Those missing include 17 crew and 21 passengers.They were travelling to provide logistical support to a military base on Antarctica's King George Island. A search-and-rescue mission is under way... End quote.

crew of 17 is a bit much, might be the flight crew plus a complete service and maintenance team,
the passengers are military and civilian,