the path should not be added to the database.
the path to the image will be document relative and will change depending on the page you are displaying the image on.
its a better practice to add the path to the image tag rather than store it in the DB. for example:
<img src="boat_images/<?php echo $row_WADAboats["dt_boatImage1"]; ?>" alt="<?php echo $row_WADAboats["dt_image1_alt"]; ?>" width="300" class="WADADetailsMainImage" />