Even then train movements were sporadic and subject to frequent stoppages, derailments, capture and attack. A sighted referee directs stoppages and restarts. Many other unions called for two hour work stoppages. It fired about 1,900 rounds without stoppages. Lack of proper lubrication is the most common source of weapon stoppages or jams. These stoppages and changes prevented her from being completed before the end of the war. Swick lived up to his nickname with several quick stoppages in his subsequent fights. There have been four league-wide work stoppages in NHL history, all occurring after 1992. All three matches are officially listed as third-round TKO stoppages. Passengers had to bear sweltering heat in the congested buses as well as constant stoppages. During the test, the SCAR suffered 226 stoppages. These early PLAs focused on establishing standard rates of pay and preventing work stoppages. There were four red flag stoppages during the session. I/II Stoppages of 952 rounds, with a MRBEFF of Class III Stoppages of 60,000 rounds.