Translation guide
A fixed post on a dock or shore used to secure a boat with ropes.
The learner wants to refer to the physical object used to tie up a boat.
In casual conversation, you might simply point and say あれ (that) or describe the action: 船をとめる柱 (post for stopping a boat). Technical terms like ビット or ボラード are used by sailors and in port operations.
The rope is wrapped around the mooring post.
I tied the boat securely to the mooring post.
Loanword from English 'bitt', commonly used in nautical contexts for a pair of posts.
I put the rope over the bitt.
Loanword from English 'bollard', used in modern port facilities.
We moored the boat to the bollard on the quay.
A wooden stake or pile used for mooring, often in traditional or small-scale settings.
I tied the small boat to the mooring stake on the riverbank.