Charts. Patience, Cape, and Robben Island, Sakhalin Island, Sea of Okhotsk, from British and Russian sketch surveys, scale naut. m.= 0.3 in.; with insets, Robben, [or] Tyulenya or Seal Island, from latest Russian chart, scale naut. m.= 10.4 in.; Cape Patience, Sakhalin I., East Bay, from British survey in 1893, scale naut. m.= 3 in.; chart 1960.