other lines. Screw jacks were placed on the corners of the railcar and the car was raised slightly to take its weight off of its wheels. Chains and turnbuckles were placed around the car frame and hooked onto the rails and tightened. Clamps were placed behind the wheels on the rails. Deckhands engaged in continual inspection and tightening of the gear during the crossing. This system effectively held the cars in place when the ship encountered rough weather. Some accidents have occurred at the slip during loading, when stability can be a major problem. Train ferries often list when heavy cars are loaded onto a track on one side while the other side is empty. Normal procedure was to load half of a track on one side, all of the track on the other side, and then the rest of the original track. If this procedure was not followed, results could be disastrous. In 1909, capsized in its slip in Manistique, Michigan when a switching crew put eight cars of iron ore on its portside tracks. The crew got off without loss of life, but salvage operations were costly and time-consuming. The Japanese train ferry, Toya Maru, sank during typhoon Marie on 26 September 1954, killing more than a thousand. Four other train ferries, Seikan maru No.11, Kitami Maru, Tokachi Maru and Hidaka Maru also sank on that day; the loss appeared to be of about 1,430 people. At the time, Japanese train ferries did not have a rear sea-gate, because engineers believed that in-rushing water would simply flow out again quickly and would not pose a danger. However, when the frequency of waves bears the wrong relationship to the length of a ship, each wave arrives as the water from the previous wave is trying to leave, causing water to accumulate on the ship. After the accidents, all Japanese train ferries were retrofitted with rear sea-gates and weather forecast technology was greatly promoted. The Norwegian train ferry, Skagerrak, built in 1965, sank in gale-force winds on 7 September 1966, on a journey between Kristiansand, Norway, and Hirtshals, Denmark, when the rear sea-gate was destroyed by heavy seas. One person subsequently died of injuries, and six freight cars and a number of automobiles sank to the bottom with the ship. The Canadian train ferry sank on 20 April 1970, while assisting in a search and rescue operation for a sinking