Installing marine electronics on boats requires tools and gear. I have lots of this stuff. So much that often the problem is in locating where things are in the
beast truck. Ethernet cable testers, several soldering irons of varying wattage's, a fox and hound for chasing wires, volt and clamp on meters, specialized crimpers, outlet testers and much more high tech gear. Most are rarely used or needed on a daily basis. To deal with many boats you have to throw away the finesse, and use things more commonly wielded by stone masons, or needed by railroad track repair crews. The boat often won't give up its gear until substantial brute force is applied.