Starting in July, a number of small UN warships—including the British Royal Navy frigate , the South Korean frigate PF62 and the Royal Australian Navy frigate —began operating in the Han River, north-west of the South Korean capital, Seoul. The UN warships were able to penetrate inland from the Yellow Sea to a wide anchorage at the confluence of a number of narrow channels which were still navigable at high tide. From this point many important Chinese targets on the north bank of the Han were engaged with naval gunfire. The frigates had been selected for this task as they combined a shallow draft with adequate firepower and range.
