5-1CHAPTER 5: E QUIPMENT MAINTENANCEhis chapter provides instructions for equipment maintenance andincludes guides for taking care of the equipment on a daily, weekly, andlong term basis. In addition, instructions are provided for replacing thefixed tail cone assembly.5.1 Maintenance General CommentsEquipment used at sea is subjected to severe environmental and handlingconditions. While the Series 5000 Sonar System is designed to operate in suchconditions, a certain amount of routine maintenance is necessary to ensure troublefree, long term operation.Keep a maintenance log. This provides assistance in tracking what has or has notbeen done with the system. A log is useful when tracking problems, if they dooccur, and is especially important if more than one TPU, Computer Control andDisplay Unit (computer), or towfish is used in a large survey operation. Inventorythe system, related spares and accessories carefully. Record the serial numbers ofthe major components, such as the TPU, the computer, and the towfish. Store theshipping boxes in a safe place so they can be reused when needed. A small amountof regular maintenance and care makes the critical difference in a successful fieldoperation. The following pages contain the recommended routine checking andmaintenance schedules for a daily, weekly, and long term basis.5.2 Maintenance Checklists5.2.1 Daily Maintenance ChecklistPerform the following maintenance steps at the end of each day’s operation:1. Turn off the power to the TPU and to the computer.2. Verify that all cables and connectors are secure and tightened.3. If fresh water is available, wash down the towfish and towing apparatus. Coverthem while not in use to protect against salt water spray and to minimizecorrosion.T
