津軽海峡
"Tsushima" arrived at Hakodate, Japan, on Tsugaru Strait around sunset on 17 August 1904, and "Chitose" met her there at about 13:00 on 18 August. They received orders to patrol in the Sea of Japan off the western side of Tsugaru Strait until 08:00 on 19 August. If "Novik" did not appear by that time, they were to split up, with "Chitose" continuing to watch Tsugaru Strait while "Tsushima" steamed north to investigate La Perouse Strait. When there was no sign of "Novik", they duly parted company as ordered.