Translation guide
In Japanese, counting boats requires a specific counter word. The most common counter is 隻 (せき), used for vessels of any size. For small boats, especially those that are rowed or paddled, 艘 (そう) is also used. The choice depends on the type and size of the boat.
The speaker wants to count boats or ships in general, regardless of size or type.
The standard counter for boats, ships, and other vessels. It can be used for anything from small fishing boats to large tankers.
港に船が三隻停泊している。
Three ships are anchored in the harbor.
一隻のヨットが沖に見える。
A single yacht can be seen offshore.
Used primarily for small boats, especially those propelled by oars or paddles, like rowboats or canoes. It can also be used for small sailing boats.
湖に小舟が一艘浮かんでいる。
A small boat is floating on the lake.
二艘のカヌーが川を下っている。
Two canoes are going down the river.
隻 is the general counter for all types of vessels. 艘 is more specific to small, often manually propelled boats. In modern usage, 隻 is more common and can replace 艘 in many contexts, but 艘 adds a nuance of smallness or traditional style.
The counter 隻 uses the on'yomi reading せき, but the number one becomes いっせき (not いちせき) due to euphonic change. Similarly, 八隻 is はっせき, and 十隻 is じゅっせき or じっせき. For 艘, it's いっそう, はっそう, じゅっそう/じっそう.