Schnellboote, Tactical Small Craft Warfare, 1939-1945. SimCan says: "Darkness cloaks the Slot. Off the bow two other boats of the squadron idle along silently at 4 knots, almost invisible. The radio crackles into muffled life. The Tokyo Express has just passed the other half of the squadron, too distant to attack, but they are coming in. And they will now be between the fires of all six boats. The giant motors crank over, phosphorescent wakes building along the hulls, as the PTs rush to the attack point at 40 knots. Not all will return, but the Express will derail tonight."