diff --git a/eos/effects/doomsdayaoeecm.py b/eos/effects/doomsdayaoeecm.py
new file mode 100644
index 000000000..0c6fd47ff
--- /dev/null
+++ b/eos/effects/doomsdayaoeecm.py
@@ -0,0 +1,18 @@
+# ECMBurstJammer
+#
+# Used by:
+# Modules from group: Burst Jammer (11 of 11)
+from eos.modifiedAttributeDict import ModifiedAttributeDict
+
+type = "projected", "active"
+
+
+def handler(fit, module, context, **kwargs):
+    if "projected" in context:
+        # jam formula: 1 - (1- (jammer str/ship str))^(# of jam mods with same str))
+        strModifier = 1 - module.getModifiedItemAttr("scan{0}StrengthBonus".format(fit.scanType)) / fit.scanStrength
+
+        if 'effect' in kwargs:
+            strModifier *= ModifiedAttributeDict.getResistance(fit, kwargs['effect'])
+
+        fit.ecmProjectedStr *= strModifier
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