to center. Some aircraft must have the nosewheel aligned to center manually. 4. The plane captain connects the ground wire and installs wing fold jury struts, parking harness and batten boards, engine and cockpit covers, and tie-downs needed other than the initial tie-downs put on by the aircraft-handling crews. Detailed procedures for securing a specific aircraft are found in the maintenance instruction manual (MIM) for that aircraft. HEAVY WEATHER PROCEDURES The procedure for securing aircraft during heavy weather differs very little from that used in normal weather. The main difference is that more tie-downs are used. All flight control surfaces are secured with battens, and controls inside the aircraft are secured. Figure 10-6 shows the heavy weather tie-down arrangement for an aircraft. When extremely heavy weather is anticipated, as many aircraft as possible are spotted on the hangar deck. The remainder are spotted in the fly 2 (center) and fly 3 (aft) areas of the flight deck. Avoid securing aircraft athwartship and in the heavy weather spot. Aircraft remaining on the flight deck should be spotted inboard along either side of the center line of the deck. Leave a clear area around the perimeter of the flight deck. If possible, spread the wings on the aircraft that are spotted on the flight deck. For special instructions on securing an individual aircraft, refer to the aircraft's specific maintenance manual. When the ship is not at flight quarters or during heavy weather conditions, the Air Department is required to maintain a security/integrity watch on the flight deck and hangar deck to ensure that each aircraft remains properly secured. The watch must be especially alert for loose or broken jury struts, tie-downs, battens, chocks, engine intake/exhaust and canopy covers, any leakage, or hazardous conditions. Extreme caution is necessary when you handle aircraft in heavy weather. COLD WEATHER PROCEDURES Handling aircraft during cold weather operations is extremely difficult. Keep as many aircraft on the hangar deck as is possible during extremely cold weather. Keep the flight deck clear of ice and snow. The following methods, gear, and equipment for snow and ice removal are often used: 1. Mobile equipment removal—some aircraft tow tractors may be fitted with snowplow blades or with rattan or wire rotary brushes. 2. Manual removal—conventional methods include brooms, crowbars, shovels, wooden mallets, 10-28 ANf1006 0 4 8 6 7 5 3 1 1 1 2 9 10 Figure 10-6.—Heavy weather aircraft tie-down.