by means of a ship or ships
乘船
other army units were sent by sea.
其他部队通过海路运送。
set out on a voyage
出海航行
situated on the coast
在岸边
leave land on a voyage
离岸出海
On the sea, especially on a sea voyage.
海上的，尤指海上航行
In a state of confusion or perplexity; at a loss.
茫然，不知所措：处于混乱的或困惑的状态；不知所措