There was no room for error in a maneuver like that. The old Shackle communications system took so long to encode and decode, and it was so frequently inaccurate, that using it for the transmission of on-the-fly target coordinates was a perilous proposition. Frequently, in the midst of battle, instead of using the Shackle code, the Marines had transmitted in English. They knew the transmissions were probably being monitored by the japanese, so they salted the messages liberally with profanity, hoping to confuse the enemy.
The men in each car had been placed in the brakeman’s boxes; at night searchlights went into action whenever necessary. Their cones of light, shining out of both sides of the train as soon as the first shot was fired, dazzled the partisans and made it possible for our men to see every movement and discern their intentions. Thereupon they were defeated with rapid fire and hand grenades. The brakes were applied and the train came to a sudden halt.