diff --git a/core/assets/icons/icons.properties b/core/assets/icons/icons.properties
index 2b29514b5b..2bcf2d22de 100755
--- a/core/assets/icons/icons.properties
+++ b/core/assets/icons/icons.properties
@@ -1,6 +1,6 @@
 63743=spawn|block-spawn-ui
 63742=deepwater|block-deepwater-ui
-63741=water|block-water-ui
+63741=water|block-shallow-water-ui
 63740=tainted-water|block-tainted-water-ui
 63739=darksand-tainted-water|block-darksand-tainted-water-ui
 63738=sand-water|block-sand-water-ui
diff --git a/core/assets/maps/coastline.msav b/core/assets/maps/coastline.msav
new file mode 100644
index 0000000000..eacc6615ea
Binary files /dev/null and b/core/assets/maps/coastline.msav differ
diff --git a/core/src/mindustry/content/SectorPresets.java b/core/src/mindustry/content/SectorPresets.java
index e66908e247..b1f0796a29 100644
--- a/core/src/mindustry/content/SectorPresets.java
+++ b/core/src/mindustry/content/SectorPresets.java
@@ -10,7 +10,8 @@ public class SectorPresets implements ContentList{
     groundZero,
     craters, biomassFacility, frozenForest, ruinousShores, windsweptIslands, stainedMountains, tarFields,
     fungalPass, extractionOutpost, saltFlats, overgrowth,
-    impact0078, desolateRift, nuclearComplex, planetaryTerminal;
+    impact0078, desolateRift, nuclearComplex, planetaryTerminal,
+    coastline, navalFortress;
 
     @Override
     public void load(){
@@ -64,6 +65,18 @@ public class SectorPresets implements ContentList{
             useAI = false;
         }};
 
+        coastline = new SectorPreset("coastline", serpulo, 108){{
+            captureWave = 30;
+            difficulty = 5;
+        }};
+
+        //TODO
+        if(false)
+        navalFortress = new SectorPreset("navalFortress", serpulo, 216){{
+            useAI = true;
+            difficulty = 8;
+        }};
+
         fungalPass = new SectorPreset("fungalPass", serpulo, 21){{
             difficulty = 4;
             useAI = false;
diff --git a/core/src/mindustry/content/TechTree.java b/core/src/mindustry/content/TechTree.java
index 199c81a5f8..a28af513a5 100644
--- a/core/src/mindustry/content/TechTree.java
+++ b/core/src/mindustry/content/TechTree.java
@@ -421,8 +421,8 @@ public class TechTree implements ContentList{
                                 });
                             });
 
-                            node(retusa, () -> {
-                                node(oxynoe, () -> {
+                            node(retusa, Seq.with(new SectorComplete(windsweptIslands)), () -> {
+                                node(oxynoe, Seq.with(new SectorComplete(coastline)), () -> {
                                     node(cyerce, () -> {
                                         node(aegires, () -> {
                                             node(navanax, () -> {
@@ -533,6 +533,14 @@ public class TechTree implements ContentList{
                                 ), () -> {
 
                                 });
+
+                                node(coastline, Seq.with(
+                                    new SectorComplete(windsweptIslands),
+                                    new Research(navalFactory),
+                                    new Research(payloadConveyor)
+                                ), () -> {
+                                    //TODO naval fortress
+                                });
                             });
                         });