Height for seafloor

src/engine/objects/Zone.java

@@ -214,6 +214,7 @@ public class Zone extends AbstractGameObject {
         if (this.parent == null) {
             this.absX = this.xOffset;
             this.absY = MBServerStatics.SEA_FLOOR_ALTITUDE;
+            this.global_height = MBServerStatics.SEA_FLOOR_ALTITUDE;
             this.absZ = this.zOffset;
             this.seaLevel = 0;
             this.setBounds();