Buy the necessary equipment. Learn how to do it and learn how to do it well. Enough said. This will be better than any technology. Ensure you have a good barometer and comprehensive paper charts also. You never know what will happen.
Those people suggesting an EPIRB are on track. There are several good books that will give you the basics on the sailing technology you need. I would add a laptop computer with satcom as a backup also.
Finally, a skerry cruiser is a long slender and most importantly low freeboard boat. I know the "best boat arguement" for sailing around the world is touchy, but this might not be the best boat for offshore sailing in heavy seas. Have you done a careful evaluation of the vessel as well as your relative skill level and experience as a sailor and where exactly you plan on sailing to? I'm assuming yes as you are having it built but I just wanted to check. I for example in the Pacific Northwest would *not* take this type of boat into the North Pacific or out of our sheltered waters.