I am super fortunate enough to have three Standard Horizon Instruments on the exterior of the Cabin in the cockpit area. Unfortunately none of them work. All three are inserted into nice 3"- 4" holes. I am not finding new ones to dream about, as replacements. If they are original to the boat then the age alone might be a challenge even to fix, and who knows if the thruhull fixtures for the speed and depth even work. Not to mention climbing the mighty mount Everest of a mast to replace the wind vane. Is it worth just glassing over the holes and finishing the gel coat leaving the bulkheads plain? My garmin can read depth and can be hooked up to a in hull transducer, I guess the speed is only necessary for calculating how long my trip will take and water temp, who cares, I want to stay dry! So what oh wise ones is your suggestions.