noun
on-the-sea ballot; maritime absentee voting
A system allowing crew members on ships to cast votes in national elections, typically by fax, when they are at sea and cannot visit a polling station.
洋上投票制度により、船員も国政選挙に参加できる。
Thanks to the maritime absentee voting system, crew members can also participate in national elections.
Compound of 洋上 (ようじょう, 'on the sea') and 投票 (とうひょう, 'voting').