Adjust any cables or chains and check setscrews on rudderpost and quadrant. Rudder bearings, in addition to rudder and prop shaft packing glands will also need to be looked at and adjusted if need be. Electrical Systems Underway, the heart of most vessel electrical systems is the battery. Taking the time to examine your ship's batteries and perform basic maintenance will assure a long service life and reliable operation. Most electrical service problems that I troubleshoot are the result of poor or corroded connections and lack of battery maintenance.
Batteries contain a corrosive acid.
Always protect yourself with safety glasses and rubber gloves. Avoid contact with skin and clothing. Neutralize contact area with baking soda and water solution. Check all battery cells for the proper water level. Fill as needed with distilled water.