diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_bireme.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_bireme.xml
index a9d73ecc30..ecbedc2b59 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_bireme.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_bireme.xml
@@ -11,6 +11,7 @@
       <PrepareTime>2000</PrepareTime>
       <RepeatTime>2000</RepeatTime>
       <Spread>1.5</Spread>
+      <PreferredClasses datatype="tokens">Human Ship</PreferredClasses>
     </Ranged>
   </Attack>
   <BuildingAI>
diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_quinquereme.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_quinquereme.xml
index dd7de71ab9..f9decdae32 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_quinquereme.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_quinquereme.xml
@@ -19,6 +19,7 @@
         <Pierce>15.0</Pierce>
         <Crush>35.0</Crush>
       </Splash>
+      <PreferredClasses datatype="tokens">Structure Ship</PreferredClasses>
     </Ranged>
   </Attack>
   <BuildingAI>
diff --git a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_trireme.xml b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_trireme.xml
index d5af1e3239..d1f29bd61b 100644
--- a/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_trireme.xml
+++ b/binaries/data/mods/public/simulation/templates/template_unit_mechanical_ship_trireme.xml
@@ -11,6 +11,7 @@
       <PrepareTime>1000</PrepareTime>
       <RepeatTime>2000</RepeatTime>
       <Spread>1.5</Spread>
+      <PreferredClasses datatype="tokens">Human Ship</PreferredClasses>
     </Ranged>
   </Attack>
   <BuildingAI>