Repaired, refueled, and replenished, "Bang" got underway again on 25 October and, with and , returned to the same area. Typhoon weather precluded effective operations during the early part of the fourth war patrol. Finally, on 22 November, improved weather enabled "Bang" to attack a convoy initially reported by "Redfish". Between midnight and 0300 on the 23d, all three submarines conducted coordinated attacks on the convoy. "Bang" fired all 24 of her torpedoes in a series of seven surface attacks, sinking two cargo ships – "Sakae Maru" and "Amakusa Maru". She reported also destroying a minelayer escort and another freighter, but Japanese records did not corroborate these kills. Between the three submarines, the convoy was totally destroyed.