ServUO - baseboat.cs exception list-free movement

[Beefcake]

According to this code, certain objects could be made exception such as ItemID, StaticID, or LandTileID, and doesn't interrupt boat movement.
how do I add those objects appearing on the map, flowers and such, which cannot be removed via UltimaLive, to the exception list?
ext: static,0xC49 or see jpeg.

thanks

        public bool CanFit(Point3D p, Map map, int itemID)
        {
            if (map == null || map == Map.Internal || Deleted || CheckDecay())
                return false;

            MultiComponentList newComponents = MultiData.GetComponents(itemID);

            for (int x = 0; x < newComponents.Width; ++x)
            {
                for (int y = 0; y < newComponents.Height; ++y)
                {
                    int tx = p.X + newComponents.Min.X + x;
                    int ty = p.Y + newComponents.Min.Y + y;
                 
                    if (newComponents.Tiles[x][y].Length == 0 || Contains(tx, ty) || IsExcludedTile(newComponents.Tiles[x][y]))
                        continue;

                    LandTile landTile = map.Tiles.GetLandTile(tx, ty);
                    StaticTile[] tiles = map.Tiles.GetStaticTiles(tx, ty, true);

                    bool hasWater = false;
                    int dif = Math.Abs(landTile.Z - p.Z);

                    if ((dif >= 0 && dif <= 1) && ((landTile.ID >= 168 && landTile.ID <= 171) || (landTile.ID >= 310 && landTile.ID <= 311)))
                        hasWater = true;

                    int z = p.Z;

                    for (int i = 0; i < tiles.Length; ++i)
                    {
                        StaticTile tile = tiles[i];

                        if (IsExcludedTile(tile))
                            continue;

                        bool isWater = (tile.ID >= 0x1796 && tile.ID <= 0x17B2);

                        if (tile.Z == p.Z && isWater)
                            hasWater = true;
                        else if (tile.Z >= p.Z && !isWater)
                        {
                            if (Owner is BaseShipCaptain && !Owner.Deleted && m_Order == BoatOrder.Course)
                            {
                                ((BaseShipCaptain)Owner).CheckBlock(tile, new Point3D(tx, ty, tile.Z));
                            }
                            return false;
                        }
                    }

                    if (!hasWater)
                    {
                        return false;
                    }
                }
            }

            IPooledEnumerable eable = map.GetObjectsInBounds(new Rectangle2D(p.X + newComponents.Min.X, p.Y + newComponents.Min.Y, newComponents.Width, newComponents.Height));

            foreach (IEntity e in eable)
            {
                int x = e.X - p.X + newComponents.Min.X;
                int y = e.Y - p.Y + newComponents.Min.Y;

                // No multi tiles on that point -or- mast/sail tiles
                if (x >= 0 && x < newComponents.Width && y >= 0 && y < newComponents.Height)
                {
                    if (newComponents.Tiles[x][y].Length == 0 || IsExcludedTile(newComponents.Tiles[x][y]))
                        continue;
                }

                if (e is Item)
                {
                    Item item = e as Item;

                    if ((item is BaseAddon || item is AddonComponent) && CheckAddon(item))
                        continue;

                    // Special item, we're good
                    if (CheckItem(itemID, item, p) || CanMoveOver(item) || item.Z < p.Z || ExemptOverheadComponent(p, itemID, item.X, item.Y, item.Z + item.ItemData.Height))
                        continue;
                }
                else if (e is Mobile)
                {
                    Mobile mobile = e as Mobile;

                    if (Contains(mobile) || ExemptOverheadComponent(p, itemID, mobile.X, mobile.Y, mobile.Z + 10))
                        continue;
                }

                if (Owner is BaseShipCaptain && !Owner.Deleted && m_Order == BoatOrder.Course)
                {
                    ((BaseShipCaptain)Owner).CheckBlock(e, e.Location);
                }

                eable.Free();
                return false;
            }

            eable.Free();
            return true;
        }