@Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Port other = (Port) obj;
        if (this.numberOfBerthes != other.numberOfBerthes) {
            return false;
        }
        if (this.capacity != other.capacity) {
            return false;
        }
        if (this.loading != other.loading) {
            return false;
        }
        return true;
    }