So this is another minor bug:
When a Seraphim chicken stands in low water, as on White Fire, its weapons make no noise when they fire. All other experimentals do make sounds, only the chicken does not. You can only hear the splashes when they hit the water.
Also, in such a case an experimental is only detected by a) Omni or b) sonar. If you have only vision, for example with a soothsayer, you cannot see it. Also, radar does not see it. That goes also for the GC and other exp.