diff --git a/core/src/mindustry/ai/Pathfinder.java b/core/src/mindustry/ai/Pathfinder.java
index 37b4a9e811..f2baaaaddb 100644
--- a/core/src/mindustry/ai/Pathfinder.java
+++ b/core/src/mindustry/ai/Pathfinder.java
@@ -8,6 +8,7 @@ import arc.struct.*;
 import arc.util.TaskQueue;
 import arc.util.*;
 import mindustry.annotations.Annotations.*;
+import mindustry.content.*;
 import mindustry.core.*;
 import mindustry.game.EventType.*;
 import mindustry.game.*;
@@ -262,7 +263,7 @@ public class Pathfinder implements Runnable{
         tile.build == null || !solid || tile.block() instanceof CoreBlock ? 0 : Math.min((int)(tile.build.health / 40), 80),
         tid == 0 && tile.build != null && state.rules.coreCapture ? 255 : tid, //use teamid = 255 when core capture is enabled to mark out derelict structures
         solid,
-        tile.floor().isLiquid && !tile.block().solid,
+        tile.floor().isLiquid && tile.block() == Blocks.air,
         tile.legSolid(),
         nearLiquid,
         nearGround,
diff --git a/core/src/mindustry/content/UnitTypes.java b/core/src/mindustry/content/UnitTypes.java
index 2160e2156c..baca774ccc 100644
--- a/core/src/mindustry/content/UnitTypes.java
+++ b/core/src/mindustry/content/UnitTypes.java
@@ -1583,6 +1583,7 @@ public class UnitTypes{
             accel = 0.4f;
             rotateSpeed = 3.3f;
             faceTarget = false;
+            crushDamage = 6f;
 
             trailLength = 20;
             waveTrailX = 4f;
@@ -1644,6 +1645,9 @@ public class UnitTypes{
             accel = 0.3f;
             rotateSpeed = 2.6f;
             faceTarget = false;
+            crushDamage = 8f;
+            crushRadX = 1;
+            crushRadY = 2;
 
             moveSoundVolume = 0.55f;
             moveSoundPitchMin = moveSoundPitchMax = 0.9f;
@@ -1706,6 +1710,9 @@ public class UnitTypes{
             hitSize = 20f;
             armor = 7f;
             faceTarget = false;
+            crushDamage = 12f;
+            crushRadX = 1;
+            crushRadY = 2;
 
             moveSoundVolume = 0.7f;
             moveSoundPitchMin = moveSoundPitchMax = 0.77f;
@@ -1805,6 +1812,9 @@ public class UnitTypes{
             accel = 0.2f;
             rotateSpeed = 1.3f;
             faceTarget = false;
+            crushDamage = 15f;
+            crushRadX = 2;
+            crushRadY = 3;
 
             moveSoundVolume = 1f;
             moveSound = Sounds.shipMoveBig;
@@ -1898,6 +1908,9 @@ public class UnitTypes{
             accel = 0.19f;
             rotateSpeed = 0.9f;
             faceTarget = false;
+            crushDamage = 17f;
+            crushRadX = 2;
+            crushRadY = 5;
 
             moveSoundVolume = 1.1f;
             moveSound = Sounds.shipMoveBig;
@@ -1953,6 +1966,7 @@ public class UnitTypes{
             faceTarget = false;
             range = 100f;
             armor = 3f;
+            crushDamage = 6f;
 
             moveSoundVolume = 0.4f;
             moveSound = Sounds.shipMove;
@@ -2057,6 +2071,7 @@ public class UnitTypes{
             accel = 0.4f;
             rotateSpeed = 4f;
             faceTarget = false;
+            crushDamage = 8f;
 
             moveSoundVolume = 0.55f;
             moveSoundPitchMin = moveSoundPitchMax = 0.9f;
@@ -2138,6 +2153,8 @@ public class UnitTypes{
             hitSize = 20f;
             armor = 6f;
             faceTarget = false;
+            crushDamage = 12f;
+            crushRadY = 2;
 
             moveSoundVolume = 0.7f;
             moveSoundPitchMin = moveSoundPitchMax = 0.77f;
@@ -2273,6 +2290,7 @@ public class UnitTypes{
         aegires = new UnitType("aegires"){{
             health = 12000;
             armor = 12f;
+            crushDamage = 15f;
 
             speed = 0.7f;
             drag = 0.17f;
@@ -2280,6 +2298,8 @@ public class UnitTypes{
             accel = 0.2f;
             rotateSpeed = 1.4f;
             faceTarget = false;
+            crushRadX = 2;
+            crushRadY = 3;
 
             moveSoundVolume = 1f;
             moveSound = Sounds.shipMoveBig;
@@ -2331,6 +2351,9 @@ public class UnitTypes{
             accel = 0.2f;
             rotateSpeed = 1.1f;
             faceTarget = false;
+            crushDamage = 17f;
+            crushRadX = 3;
+            crushRadY = 5;
 
             moveSoundVolume = 1.1f;
             moveSound = Sounds.shipMoveBig;
diff --git a/core/src/mindustry/entities/EntityCollisions.java b/core/src/mindustry/entities/EntityCollisions.java
index ea5b3f8e07..8d0f64bfea 100644
--- a/core/src/mindustry/entities/EntityCollisions.java
+++ b/core/src/mindustry/entities/EntityCollisions.java
@@ -5,6 +5,7 @@ import arc.math.*;
 import arc.math.geom.*;
 import arc.struct.*;
 import arc.util.*;
+import mindustry.content.*;
 import mindustry.gen.*;
 import mindustry.world.*;
 
@@ -133,7 +134,7 @@ public class EntityCollisions{
 
     public static boolean waterSolid(int x, int y){
         Tile tile = world.tile(x, y);
-        return tile == null || tile.solid() || !tile.floor().isLiquid;
+        return tile == null || tile.solid() || !tile.floor().isLiquid || tile.block() != Blocks.air;
     }
 
     public static boolean solid(int x, int y){
diff --git a/core/src/mindustry/entities/comp/WaterMoveComp.java b/core/src/mindustry/entities/comp/WaterMoveComp.java
index e442ec9b3f..bbe3a6a14d 100644
--- a/core/src/mindustry/entities/comp/WaterMoveComp.java
+++ b/core/src/mindustry/entities/comp/WaterMoveComp.java
@@ -4,10 +4,12 @@ import arc.graphics.*;
 import arc.graphics.g2d.*;
 import arc.math.*;
 import arc.util.*;
+import mindustry.*;
 import mindustry.annotations.Annotations.*;
 import mindustry.content.*;
 import mindustry.entities.*;
 import mindustry.entities.EntityCollisions.*;
+import mindustry.game.*;
 import mindustry.gen.*;
 import mindustry.graphics.*;
 import mindustry.type.*;
@@ -18,11 +20,16 @@ import static mindustry.Vars.*;
 
 @Component
 abstract class WaterMoveComp implements Posc, Velc, Hitboxc, Unitc{
+    private static final float crushInterval = 5f;
+
+    @Import Team team;
+    @Import boolean disarmed;
     @Import float x, y, rotation, speedMultiplier;
     @Import UnitType type;
 
     private transient Trail tleft = new Trail(1), tright = new Trail(1);
     private transient Color trailColor = Blocks.water.mapColor.cpy().mul(1.5f);
+    private transient float crushTimer = Mathf.random(crushInterval);
 
     @Override
     public void update(){
@@ -35,6 +42,22 @@ abstract class WaterMoveComp implements Posc, Velc, Hitboxc, Unitc{
             float cx = Angles.trnsx(rotation - 90, type.waveTrailX * sign, type.waveTrailY) + x, cy = Angles.trnsy(rotation - 90, type.waveTrailX * sign, type.waveTrailY) + y;
             t.update(cx, cy, world.floorWorld(cx, cy).isLiquid && !flying ? 1 : 0);
         }
+
+        if(type.crushDamage > 0 && !disarmed){
+            if((crushTimer += Time.delta) >= crushInterval){
+                crushTimer %= crushInterval;
+
+                for(int cx = -type.crushRadX; cx <= type.crushRadX; cx++){
+                    for(int cy = -type.crushRadY; cy <= type.crushRadY; cy++){
+                        Tmp.v1.trns(rotation - 90f, cx * tilesize, cy * tilesize);
+                        var other = Vars.world.buildWorld(x + Tmp.v1.x, y + Tmp.v1.y);
+                        if(other != null && other.team != team && other.floor().isLiquid && !other.block.solid){
+                            other.damage(team, type.crushFragile && other.block.crushFragile ? 99999999f : type.crushDamage * crushInterval);
+                        }
+                    }
+                }
+            }
+        }
     }
 
     @Override
diff --git a/core/src/mindustry/type/UnitType.java b/core/src/mindustry/type/UnitType.java
index 71ce5640d9..23a38e9865 100644
--- a/core/src/mindustry/type/UnitType.java
+++ b/core/src/mindustry/type/UnitType.java
@@ -499,6 +499,9 @@ public class UnitType extends UnlockableContent implements Senseable{
     /** the fraction of solids under this block necessary for it to reach crawlSlowdown. */
     crawlSlowdownFrac = 0.55f;
 
+    /** for naval units only: crush rectangle half-extents, rotated with the unit */
+    public int crushRadX = 1, crushRadY = 1;
+
     //MISSILE UNITS
 
     /** lifetime of this missile. */