craftbukkit/nms-patches/net/minecraft/world/entity/vehicle/AbstractBoat.patch

--- a/net/minecraft/world/entity/vehicle/AbstractBoat.java
+++ b/net/minecraft/world/entity/vehicle/AbstractBoat.java
@@ -48,6 +48,15 @@
 import net.minecraft.world.phys.shapes.VoxelShape;
 import net.minecraft.world.phys.shapes.VoxelShapes;
 
+// CraftBukkit start
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.util.CraftLocation;
+import org.bukkit.entity.Vehicle;
+import org.bukkit.event.entity.EntityRemoveEvent;
+import org.bukkit.event.vehicle.VehicleEntityCollisionEvent;
+import org.bukkit.event.vehicle.VehicleMoveEvent;
+// CraftBukkit end
+
 public abstract class AbstractBoat extends VehicleEntity implements Leashable {
 
     private static final DataWatcherObject<Boolean> DATA_ID_PADDLE_LEFT = DataWatcher.defineId(AbstractBoat.class, DataWatcherRegistry.BOOLEAN);
@@ -87,6 +96,14 @@
     private Leashable.a leashData;
     private final Supplier<Item> dropItem;
 
+    // CraftBukkit start
+    // PAIL: Some of these haven't worked since a few updates, and since 1.9 they are less and less applicable.
+    public double maxSpeed = 0.4D;
+    public double occupiedDeceleration = 0.2D;
+    public double unoccupiedDeceleration = -1;
+    public boolean landBoats = false;
+    // CraftBukkit end
+
     public AbstractBoat(EntityTypes<? extends AbstractBoat> entitytypes, World world, Supplier<Item> supplier) {
         super(entitytypes, world);
         this.dropItem = supplier;
@@ -182,9 +199,29 @@
     public void push(Entity entity) {
         if (entity instanceof AbstractBoat) {
             if (entity.getBoundingBox().minY < this.getBoundingBox().maxY) {
+                // CraftBukkit start
+                if (!this.isPassengerOfSameVehicle(entity)) {
+                    VehicleEntityCollisionEvent event = new VehicleEntityCollisionEvent((Vehicle) this.getBukkitEntity(), entity.getBukkitEntity());
+                    this.level().getCraftServer().getPluginManager().callEvent(event);
+
+                    if (event.isCancelled()) {
+                        return;
+                    }
+                }
+                // CraftBukkit end
                 super.push(entity);
             }
         } else if (entity.getBoundingBox().minY <= this.getBoundingBox().minY) {
+            // CraftBukkit start
+            if (!this.isPassengerOfSameVehicle(entity)) {
+                VehicleEntityCollisionEvent event = new VehicleEntityCollisionEvent((Vehicle) this.getBukkitEntity(), entity.getBukkitEntity());
+                this.level().getCraftServer().getPluginManager().callEvent(event);
+
+                if (event.isCancelled()) {
+                    return;
+                }
+            }
+            // CraftBukkit end
             super.push(entity);
         }
 
@@ -247,6 +284,7 @@
         return this.getDirection().getClockWise();
     }
 
+    private Location lastLocation; // CraftBukkit
     @Override
     public void tick() {
         this.oldStatus = this.status;
@@ -287,6 +325,21 @@
             this.setDeltaMovement(Vec3D.ZERO);
         }
 
+        // CraftBukkit start
+        org.bukkit.Server server = this.level().getCraftServer();
+        org.bukkit.World bworld = this.level().getWorld();
+
+        Location to = CraftLocation.toBukkit(this.position(), bworld, this.getYRot(), this.getXRot());
+        Vehicle vehicle = (Vehicle) this.getBukkitEntity();
+
+        server.getPluginManager().callEvent(new org.bukkit.event.vehicle.VehicleUpdateEvent(vehicle));
+
+        if (lastLocation != null && !lastLocation.equals(to)) {
+            VehicleMoveEvent event = new VehicleMoveEvent(vehicle, lastLocation, to);
+            server.getPluginManager().callEvent(event);
+        }
+        lastLocation = vehicle.getLocation();
+        // CraftBukkit end
         this.applyEffectsFromBlocks();
         this.applyEffectsFromBlocks();
         this.tickBubbleColumn();
@@ -790,11 +843,18 @@
 
     @Override
     public void remove(Entity.RemovalReason entity_removalreason) {
+        // CraftBukkit start - add Bukkit remove cause
+        this.remove(entity_removalreason, null);
+    }
+
+    @Override
+    public void remove(Entity.RemovalReason entity_removalreason, EntityRemoveEvent.Cause cause) {
+        // CraftBukkit end
         if (!this.level().isClientSide && entity_removalreason.shouldDestroy() && this.isLeashed()) {
             this.dropLeash(true, true);
         }
 
-        super.remove(entity_removalreason);
+        super.remove(entity_removalreason, cause); // CraftBukkit - add Bukkit remove cause
     }
 
     @Override