diff --git a/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/NeighbourhoodGridExplorer.java b/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/NeighbourhoodGridExplorer.java
new file mode 100644
index 000000000..ed80727c3
--- /dev/null
+++ b/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/NeighbourhoodGridExplorer.java
@@ -0,0 +1,51 @@
+/*
+ * POSEIDON: an agent-based model of fisheries
+ * Copyright (c) 2024 CoHESyS Lab cohesys.lab@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package uk.ac.ox.poseidon.agents.behaviours.destination;
+
+import ec.util.MersenneTwisterFast;
+import lombok.RequiredArgsConstructor;
+import sim.util.Int2D;
+import uk.ac.ox.poseidon.agents.behaviours.choices.Explorer;
+import uk.ac.ox.poseidon.agents.vessels.Vessel;
+import uk.ac.ox.poseidon.geography.paths.GridPathFinder;
+
+import java.util.function.IntSupplier;
+
+import static uk.ac.ox.poseidon.core.MasonUtils.oneOf;
+
+@RequiredArgsConstructor
+public class NeighbourhoodGridExplorer implements Explorer<Int2D> {
+
+    private final Vessel vessel;
+    private final GridPathFinder pathFinder;
+    private final IntSupplier neighbourhoodSizeSupplier;
+    private final MersenneTwisterFast rng;
+
+    @Override
+    public Int2D explore(final Int2D currentCell) {
+        return oneOf(
+            pathFinder.getAccessibleWaterNeighbours(
+                currentCell == null ? vessel.getCurrentCell() : currentCell,
+                neighbourhoodSizeSupplier.getAsInt()
+            ),
+            rng
+        );
+    }
+}
diff --git a/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/NeighbourhoodGridExplorerFactory.java b/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/NeighbourhoodGridExplorerFactory.java
new file mode 100644
index 000000000..6b06cdb42
--- /dev/null
+++ b/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/NeighbourhoodGridExplorerFactory.java
@@ -0,0 +1,55 @@
+/*
+ * POSEIDON: an agent-based model of fisheries
+ * Copyright (c) 2024 CoHESyS Lab cohesys.lab@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package uk.ac.ox.poseidon.agents.behaviours.destination;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import uk.ac.ox.poseidon.agents.vessels.Vessel;
+import uk.ac.ox.poseidon.agents.vessels.VesselScopeFactory;
+import uk.ac.ox.poseidon.core.Factory;
+import uk.ac.ox.poseidon.core.Simulation;
+import uk.ac.ox.poseidon.geography.paths.GridPathFinder;
+
+import java.util.function.IntSupplier;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class NeighbourhoodGridExplorerFactory extends VesselScopeFactory<NeighbourhoodGridExplorer> {
+
+    private Factory<? extends GridPathFinder> pathFinder;
+    private Factory<? extends IntSupplier> neighbourhoodSizeSupplier;
+
+    @Override
+    protected NeighbourhoodGridExplorer newInstance(
+        final Simulation simulation,
+        final Vessel vessel
+    ) {
+        return new NeighbourhoodGridExplorer(
+            vessel,
+            pathFinder.get(simulation),
+            neighbourhoodSizeSupplier.get(simulation),
+            simulation.random
+        );
+    }
+}
diff --git a/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/RandomGridExplorerFactory.java b/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/RandomGridExplorerFactory.java
index 34da84e57..75bf2f958 100644
--- a/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/RandomGridExplorerFactory.java
+++ b/agents/src/main/java/uk/ac/ox/poseidon/agents/behaviours/destination/RandomGridExplorerFactory.java
@@ -30,7 +30,6 @@
 import uk.ac.ox.poseidon.agents.vessels.VesselScopeFactory;
 import uk.ac.ox.poseidon.core.Factory;
 import uk.ac.ox.poseidon.core.Simulation;
-import uk.ac.ox.poseidon.geography.bathymetry.BathymetricGrid;
 import uk.ac.ox.poseidon.geography.paths.GridPathFinder;
 
 @Getter
@@ -39,7 +38,6 @@
 @AllArgsConstructor
 public class RandomGridExplorerFactory extends VesselScopeFactory<Explorer<Int2D>> {
 
-    private Factory<? extends BathymetricGrid> bathymetricGrid;
     private Factory<? extends GridPathFinder> pathFinder;
 
     @Override
diff --git a/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/FixedIntSupplierFactory.java b/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/FixedIntSupplierFactory.java
new file mode 100644
index 000000000..61ffddadb
--- /dev/null
+++ b/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/FixedIntSupplierFactory.java
@@ -0,0 +1,43 @@
+/*
+ * POSEIDON: an agent-based model of fisheries
+ * Copyright (c) 2024 CoHESyS Lab cohesys.lab@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package uk.ac.ox.poseidon.core.suppliers;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import uk.ac.ox.poseidon.core.GlobalScopeFactory;
+import uk.ac.ox.poseidon.core.Simulation;
+
+import java.util.function.IntSupplier;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class FixedIntSupplierFactory extends GlobalScopeFactory<IntSupplier> {
+
+    private int value;
+
+    @Override
+    protected IntSupplier newInstance(final Simulation simulation) {
+        return () -> value;
+    }
+}
diff --git a/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/PoissonIntSupplierFactory.java b/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/PoissonIntSupplierFactory.java
new file mode 100644
index 000000000..f245288ed
--- /dev/null
+++ b/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/PoissonIntSupplierFactory.java
@@ -0,0 +1,45 @@
+/*
+ * POSEIDON: an agent-based model of fisheries
+ * Copyright (c) 2024 CoHESyS Lab cohesys.lab@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package uk.ac.ox.poseidon.core.suppliers;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import sim.util.distribution.Poisson;
+import uk.ac.ox.poseidon.core.Simulation;
+import uk.ac.ox.poseidon.core.SimulationScopeFactory;
+
+import java.util.function.IntSupplier;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class PoissonIntSupplierFactory extends SimulationScopeFactory<IntSupplier> {
+
+    private double mean;
+
+    @Override
+    protected IntSupplier newInstance(final Simulation simulation) {
+        final Poisson poisson = new Poisson(mean, simulation.random);
+        return poisson::nextInt;
+    }
+}
diff --git a/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/ShiftedIntSupplierFactory.java b/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/ShiftedIntSupplierFactory.java
new file mode 100644
index 000000000..1d7e27175
--- /dev/null
+++ b/core/src/main/java/uk/ac/ox/poseidon/core/suppliers/ShiftedIntSupplierFactory.java
@@ -0,0 +1,46 @@
+/*
+ * POSEIDON: an agent-based model of fisheries
+ * Copyright (c) 2024 CoHESyS Lab cohesys.lab@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package uk.ac.ox.poseidon.core.suppliers;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import uk.ac.ox.poseidon.core.Factory;
+import uk.ac.ox.poseidon.core.GlobalScopeFactory;
+import uk.ac.ox.poseidon.core.Simulation;
+
+import java.util.function.IntSupplier;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class ShiftedIntSupplierFactory extends GlobalScopeFactory<IntSupplier> {
+
+    private Factory<? extends IntSupplier> intSupplier;
+    private int shift;
+
+    @Override
+    protected IntSupplier newInstance(final Simulation simulation) {
+        final IntSupplier intSupplier = this.intSupplier.get(simulation);
+        return () -> intSupplier.getAsInt() + shift;
+    }
+}
diff --git a/examples/src/main/java/uk/ac/ox/poseidon/examples/BasicScenario.java b/examples/src/main/java/uk/ac/ox/poseidon/examples/BasicScenario.java
index a776d22a8..f8f61b856 100644
--- a/examples/src/main/java/uk/ac/ox/poseidon/examples/BasicScenario.java
+++ b/examples/src/main/java/uk/ac/ox/poseidon/examples/BasicScenario.java
@@ -46,6 +46,8 @@
 import uk.ac.ox.poseidon.core.Simulation;
 import uk.ac.ox.poseidon.core.schedule.ScheduledRepeatingFactory;
 import uk.ac.ox.poseidon.core.schedule.SteppableSequenceFactory;
+import uk.ac.ox.poseidon.core.suppliers.PoissonIntSupplierFactory;
+import uk.ac.ox.poseidon.core.suppliers.ShiftedIntSupplierFactory;
 import uk.ac.ox.poseidon.core.time.*;
 import uk.ac.ox.poseidon.core.utils.PrefixedIdSupplierFactory;
 import uk.ac.ox.poseidon.geography.bathymetry.BathymetricGrid;
@@ -73,7 +75,7 @@ public class BasicScenario extends Scenario {
     private Factory<? extends Species> speciesA = new SpeciesFactory("A");
     private Factory<? extends Species> speciesB = new SpeciesFactory("B");
     private Factory<? extends BiomassDiffusionRule> biomassDiffusionRule =
-        new SmoothBiomassDiffusionRuleFactory(0.005, 0.01);
+        new SmoothBiomassDiffusionRuleFactory(0.01, 0.01);
     private Factory<? extends BiomassGrowthRule> biomassGrowthRule =
         new LogisticGrowthRuleFactory(0.1);
 
@@ -183,9 +185,12 @@ public class BasicScenario extends Scenario {
                 ),
                 new ChooseDestinationBehaviourFactory(
                     new EpsilonGreedyDestinationSupplierFactory(
-                        0.5,
+                        0.25,
                         new ExponentialMovingAverageOptionValuesFactory<>(0.1),
-                        new RandomGridExplorerFactory(bathymetricGrid, pathFinder),
+                        new NeighbourhoodGridExplorerFactory(
+                            pathFinder,
+                            new ShiftedIntSupplierFactory(new PoissonIntSupplierFactory(5), 1)
+                        ),
                         new TotalBiomassCaughtPerHourDestinationEvaluatorFactory()
                     ),
                     new TravelAlongPathBehaviourFactory(
diff --git a/geography/src/main/java/uk/ac/ox/poseidon/geography/paths/CachingGridPathFinder.java b/geography/src/main/java/uk/ac/ox/poseidon/geography/paths/CachingGridPathFinder.java
index e6554b028..36fa92605 100644
--- a/geography/src/main/java/uk/ac/ox/poseidon/geography/paths/CachingGridPathFinder.java
+++ b/geography/src/main/java/uk/ac/ox/poseidon/geography/paths/CachingGridPathFinder.java
@@ -38,6 +38,8 @@ public class CachingGridPathFinder extends CachingPathFinder<Int2D> implements G
     private final Interner<ImmutableList<Int2D>> cellListInterner = Interners.newStrongInterner();
     private final LoadingCache<Int2D, ImmutableList<Int2D>> accessibleCells =
         CacheBuilder.newBuilder().build(CacheLoader.from(this::computeAccessibleCells));
+    private final LoadingCache<Entry<Int2D, Integer>, ImmutableList<Int2D>> accessibleNeighbours =
+        CacheBuilder.newBuilder().build(CacheLoader.from(this::computeAccessibleNeighbours));
 
     CachingGridPathFinder(
         final GridPathFinder pathFinder,
@@ -59,7 +61,7 @@ public ImmutableList<Int2D> getAccessibleWaterCells(final Int2D startingCell) {
     private ImmutableList<Int2D> computeAccessibleNeighbours(
         final Entry<Int2D, Integer> entry
     ) {
-        return getAccessibleWaterNeighbours(entry.getKey(), entry.getValue());
+        return pathFinder.getAccessibleWaterNeighbours(entry.getKey(), entry.getValue());
     }
 
     @Override
@@ -85,7 +87,4 @@ public boolean isNavigable(final Int2D cell) {
         return pathFinder.isNavigable(cell);
     }
 
-    private final LoadingCache<Entry<Int2D, Integer>, ImmutableList<Int2D>> accessibleNeighbours =
-        CacheBuilder.newBuilder().build(CacheLoader.from(this::computeAccessibleNeighbours));
-
 }