首先，你的申根签证与土和乌国入境没有关系。再来谈谈

没有土和乌签证能否在热亚娜上船，答案是可以。土耳其的入境规定是：Cruise passengers can enter Turkey without a visa regardless of their nationalities. 乌克兰也是类似的规定（见一段经历过此事的人写的论坛留言：“Eventually we did not need a special visa to visit the Ukraine. When the Rotterdam docked at Yalta, Ukrainian officials just stamped our passports and after customs/police verification coming and going, all passengers and crew could circulate freely in both Yalta and Odessa.”）。这里要注意下船时拿好护照和船卡即可。