In the afternoon, Nizi adopted Spur's suggestion and, in the name of Fleet Commander, sent a telegram, requesting all submarines operating in the waters east of the Volcanic Islands and the North Ma Islands to report their status, whether or not they had encountered the Liangxia Fleet, and to report their whereabouts to the Fleet Headquarters as soon as possible.
By evening, a total of 14 submarine reports had been received.
According to the arrangement of the submarine force, this was almost all of the submarines operating in the waters east of the Volcanic Islands and the North Ma Islands.
Based on these telegrams, particularly the submarines' locations, a process of elimination could be used to make a rough estimate of the Liangxia Fleet's movements.
At that time, the only certainty was that it was highly unlikely that the Liangxia Fleet would sail southward.