Whakaotihia te rerenga e whai ake nei: I te rautau 9th, kei a Kievan Rus' te ope moana kaha e whakaatuhia ana e te angitu o te ope moana o Constantinople o te 860 Heoi ko te ope moana he rereke, ka hangaia mo te kaupapa o nga whakaekenga. Nā ki te maha ngoikore nui o te kaipuke moana, me te i roto i te tua whakangaro
I muri i te whakaekenga a te Emepaea o Mongol, ka whakakorehia te ope moana kore o nga rangatira o Kievan Rus. I tua atu i te Principality o Novgorod i uru atu ki nga moana tuwhera (penei i te Moana Baltic me te Moana Ma) ana i whakaorangia mai i nga whakaekenga a Mongol. I te timatanga o te kawanatanga tuatahi o te Grand Duchy o Moscow me te uru atu ki nga wai tuwhera, ka tiimata te Golden Age o te Navy o Ruhia. I te tau 1570, hei tiaki i te rerenga a Ruhia i te Moana Baltic, i hangaia e Ivan the Terrible tetahi flotilla i noho mo te tau kotahi. I te rau tau 16, i whawhai te Tsardom o Russia ki te Ottoman Empire kia kore ai e uru ki te Moana Pango.