OpenRA/OpenRA — pull request #5698 by Mailaender (2014-06-21 20:26:03+00:00)
Title: Added the sonar pulse to reveal sub marines

As described in #4729 this was never implemented. Balancing wise I decided to make this a localized, but multi-shot event similar to the spy plane. A good test case is http://resource.openra.net/maps/495/ which has creeps with an infiltratable sub pen and a submarine next to it plus soldiers that can be used as a disguise against the pillboxes.