Map Size: Medium
Vehicle Map: No
Sub Pens is one of the maps available in the second Call of Duty: World at War map pack.
According to callofduty.com:
"Sub Pens" offers a close-quarter bombed-out Japanese submarine base littered with live ammunition, breached subs and idle fighter planes. Wipe the monsoon rains from your eyes and struggle to control key choke points in this tight map designed for exciting and deadly battles.