Пре­об­ра­зуй­те, если это не­об­хо­ди­мо, слово SEAMAN так, чтобы оно грам­ма­ти­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

On May 17, 1970 Ra with two ______ on board successfully crossed the Atlantic, proving that ancient civilizations had enough skill to reach America long before Columbus.