1. The ship was deemed unseaworthy and had to undergo extensive repairs before it could set sail again.
这艘船被认为不适合航行，必须进行大修才能再次启航。

2. The captain refused to take the risk of sailing in such unseaworthy conditions.
船长拒绝冒险在这种不适合航行的条件下出海。

3. The old fishing boat was clearly unseaworthy and in desperate need of repairs.
这艘老渔船显然不适合航行，急需修理。

4. The maritime authority issued a warning about the dangers of using unseaworthy vessels.
海事管理机构发出警告，警告使用不适合航行的船只的危险。

5. The crew members were relieved to finally reach port after days at sea on an unseaworthy boat.
船员们终于在一艘不适合航行的船上度过数天后到达了港口，感到宽慰。

6. The company was fined for allowing their unseaworthy vessel to operate without proper maintenance.
该公司因允许他们的不适合航行的船只没有进行适当维护而被处以罚款。