public Sea(int width, int height) {
        if (width > 0 && height > 0) {
            if (width <= MAX_WIDTH && height <= MAX_HEIGHT) {
                this.width = width;
                this.height = height;
                initialPlayField(width, height);
            } else {
                System.out.println("The area of field is too large !"
                        + "Width < 100 and Height < 100");
            } 
        } else {
            System.out.println("Width or Height should be larger than 0 !! :)");
        }  
    }