Galvanic protection is provided for both the main and auxiliary headers. DECK MATS Linked, rubber and fabric, deck mats are used instead of the usual non-skid mastic. These mats are non-skid under all conditions. In addition they are resilient and non-abrasive so cause no injury to members falling on them. These mats are easily maintained and present a good appearance.
All air supplying the engines is taken from outside the vessel.
Under normal conditions, ventilation is provided in a normal manner, with air entering at the usual level above the deck or trunk cabin. If the air at this level becomes polluted these fans and vents can be shut down and air drawn into the system from the top of the mast. Under extreme conditions, where the polluted air reached to top of the mast, the entire system can be shut down and all vents closed. This would entrap enough fresh air to last the few members therein a considerable length of time. The main turret valves, wharf nozzle valves, maneuvering jet valves, etc., are operated remotely by hydraulic pressure.