
Every fall, we sailors living in the colder, wintery parts of the world, must haul out our beloved boats and set them gently onto their cradle, trailer or supports for the winter. Those in warmer climates, especially in saltwater environments, should also be hauling out regularly to clean, rinse and service the hull, etc.
As a former harbor master for over 16 years, and as someone who continues to be hands on at our yacht club, I am always amazed at how many boat owners forget or are simply unsure as to where the slings go. When the boats are in the water, one cannot see below the waterline. Important details such as what kind of keel is it—fin or full—where is the prop shaft located as well as any other items such as speed wheels, depth sounder, etc. cannot be seen from above.
Of course, in the spring, when it is time to launch our boats, it is easy to set the slings as we have full visibility of the hull, keel and the location of support pads as well as any instruments located under the boat.
TAKE A HULL PICTURE AND MARK THE SLING SPOTS

But it is not so easy come fall when the boats are in the water. That’s why I always make sure at springtime to recommend to owners that, while we have the boat properly set on slings, now is a perfect time to take a clear picture of the boat showing where the slings are set. I recommend they keep the picture available on their mobile device(s) so it can be accessed at any time. Secondly, as soon as you have time during the sailing season, I suggest they get some automotive grade , using 1- or 2-inch lengths, mark where the slings go on the side of the gunwales, where they will be easily seen when standing on the deck.
This will take the guess work out come haul out and make the process much more efficient for everyone. It will also ensure that once the crane has travelled to your cradle or trailer, the slings won’t be stuck under the support pads, which would then require more handling to set the boat down properly.

In addition, if you need to be hauled out at another location and, you will be able to show the crane crew what the bottom looks like. Or in your absence, send the picture to the facility. I can assure you they will be grateful.
HULL INFO IN CASE OF GROUNDING

Having the picture handy, is another advantage in the event of a grounding and you need help pulling the boat off the rocks or bottom. Being able to show what the bottom of the boat looks like might come in handy in determining what maneuver will be best to get you out of trouble with the least amount of damage or maybe no damage at all.
WHY AUTOMOTIVE GRADE STRIPES AND STICKERS

Not only are automotive grade stripes and sticker products inexpensive and available in all sorts of colors and sizes, but practically any automotive parts and accessory retailer will have them in stock. They are designed for outdoor use, are UV resistant and should last a long time.

Prep the surface properly to promote a better and long-lasting adhesion. Clean the surface, wipe with alcohol or acetone to remove any residual wax and contaminants, let dry. Then apply the stickers.

Wider stickers, can be cut to any shape, such a wide arrow to clearly show were the sling goes.
Also, you should have more than enough to do both sides of your boat and share the rest with a fellow boater.
Another great option is to find a local vinyl sign maker and ask them for any leftover pieces from other jobs. Or go look in their garbage bin behind the store!
Your owner’s manual should have a diagram showing sling location.
Great idea Robert. Mine maintenance log has a picture of the boat in slings. The same picture I used for this article.