干舷

例句：

1. 1. The ship'sfreeboard is crucial for safe navigation.
   船舶的干舷对于安全航行至关重要。
2. 2. Thecaptain must ensure that the vessel has enoughheadroom to avoid collisions.
   船长必须确保船只有足够的干舷以避免碰撞。
3. 3. Thecompany needs a clear headroom to expandits operations.
   公司需要足够的发展空间来扩展业务。